Home / 85,526.07-128,289.10-38,128.92

Finding the Fourth Proportional to 85,526.07, 128,289.10 and 38,128.92

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Solution

The fourth proportional to 85,526.07, 128,289.10 and 38,128.92 is: 57,193.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,526.07 : 128,289.10 = 38,128.92 : x
  2. Step 2: Convert to fraction form
    85,526.07/128,289.10 = 38,128.92/x
  3. Step 3: Cross multiply
    85,526.07x = 128,289.10 × 38,128.92
  4. Step 4: Simplify right side
    85,526.07x = 4,891,524,830.77
  5. Step 5: Solve for x
    x = 4,891,524,830.77/85,526.07
  6. Step 6: Final answer
    x = 57,193.38

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.