Home / 85,531.91-128,285.71-29,371.10

Finding the Fourth Proportional to 85,531.91, 128,285.71 and 29,371.10

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Solution

The fourth proportional to 85,531.91, 128,285.71 and 29,371.10 is: 44,052.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,531.91 : 128,285.71 = 29,371.10 : x
  2. Step 2: Convert to fraction form
    85,531.91/128,285.71 = 29,371.10/x
  3. Step 3: Cross multiply
    85,531.91x = 128,285.71 × 29,371.10
  4. Step 4: Simplify right side
    85,531.91x = 3,767,891,702.12
  5. Step 5: Solve for x
    x = 3,767,891,702.12/85,531.91
  6. Step 6: Final answer
    x = 44,052.47

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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.