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Finding the Fourth Proportional to 125,521, 173,234.34 and 72,529

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Solution

The fourth proportional to 125,521, 173,234.34 and 72,529 is: 100,098.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,521 : 173,234.34 = 72,529 : x
  2. Step 2: Convert to fraction form
    125,521/173,234.34 = 72,529/x
  3. Step 3: Cross multiply
    125,521x = 173,234.34 × 72,529
  4. Step 4: Simplify right side
    125,521x = 12,564,513,445.86
  5. Step 5: Solve for x
    x = 12,564,513,445.86/125,521
  6. Step 6: Final answer
    x = 100,098.90

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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.