Home / 85,686.35-128,555.79-38,341.29

Finding the Fourth Proportional to 85,686.35, 128,555.79 and 38,341.29

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Solution

The fourth proportional to 85,686.35, 128,555.79 and 38,341.29 is: 57,523.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,686.35 : 128,555.79 = 38,341.29 : x
  2. Step 2: Convert to fraction form
    85,686.35/128,555.79 = 38,341.29/x
  3. Step 3: Cross multiply
    85,686.35x = 128,555.79 × 38,341.29
  4. Step 4: Simplify right side
    85,686.35x = 4,928,995,379.54
  5. Step 5: Solve for x
    x = 4,928,995,379.54/85,686.35
  6. Step 6: Final answer
    x = 57,523.70

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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.