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Finding the Fourth Proportional to 125,115.98, 172,672.47 and 71,409.11

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Solution

The fourth proportional to 125,115.98, 172,672.47 and 71,409.11 is: 98,551.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,115.98 : 172,672.47 = 71,409.11 : x
  2. Step 2: Convert to fraction form
    125,115.98/172,672.47 = 71,409.11/x
  3. Step 3: Cross multiply
    125,115.98x = 172,672.47 × 71,409.11
  4. Step 4: Simplify right side
    125,115.98x = 12,330,387,151.04
  5. Step 5: Solve for x
    x = 12,330,387,151.04/125,115.98
  6. Step 6: Final answer
    x = 98,551.66

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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.