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Finding the Fourth Proportional to 85,924.52, 128,834.94 and 38,531

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Solution

The fourth proportional to 85,924.52, 128,834.94 and 38,531 is: 57,773.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,924.52 : 128,834.94 = 38,531 : x
  2. Step 2: Convert to fraction form
    85,924.52/128,834.94 = 38,531/x
  3. Step 3: Cross multiply
    85,924.52x = 128,834.94 × 38,531
  4. Step 4: Simplify right side
    85,924.52x = 4,964,139,073.14
  5. Step 5: Solve for x
    x = 4,964,139,073.14/85,924.52
  6. Step 6: Final answer
    x = 57,773.25

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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.