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Finding the Fourth Proportional to 125,295.32, 172,939.92 and 77,520.44

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Solution

The fourth proportional to 125,295.32, 172,939.92 and 77,520.44 is: 106,998.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,295.32 : 172,939.92 = 77,520.44 : x
  2. Step 2: Convert to fraction form
    125,295.32/172,939.92 = 77,520.44/x
  3. Step 3: Cross multiply
    125,295.32x = 172,939.92 × 77,520.44
  4. Step 4: Simplify right side
    125,295.32x = 13,406,378,691.96
  5. Step 5: Solve for x
    x = 13,406,378,691.96/125,295.32
  6. Step 6: Final answer
    x = 106,998.24

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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.