Home / 85,526.30-128,289.45-43,390.10

Finding the Fourth Proportional to 85,526.30, 128,289.45 and 43,390.10

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Solution

The fourth proportional to 85,526.30, 128,289.45 and 43,390.10 is: 65,085.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,526.30 : 128,289.45 = 43,390.10 : x
  2. Step 2: Convert to fraction form
    85,526.30/128,289.45 = 43,390.10/x
  3. Step 3: Cross multiply
    85,526.30x = 128,289.45 × 43,390.10
  4. Step 4: Simplify right side
    85,526.30x = 5,566,492,064.45
  5. Step 5: Solve for x
    x = 5,566,492,064.45/85,526.30
  6. Step 6: Final answer
    x = 65,085.15

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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.