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Finding the Fourth Proportional to 124,614.72, 172,005.12 and 86,901.12

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Solution

The fourth proportional to 124,614.72, 172,005.12 and 86,901.12 is: 119,949.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,614.72 : 172,005.12 = 86,901.12 : x
  2. Step 2: Convert to fraction form
    124,614.72/172,005.12 = 86,901.12/x
  3. Step 3: Cross multiply
    124,614.72x = 172,005.12 × 86,901.12
  4. Step 4: Simplify right side
    124,614.72x = 14,947,437,573.73
  5. Step 5: Solve for x
    x = 14,947,437,573.73/124,614.72
  6. Step 6: Final answer
    x = 119,949.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.