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Finding the Fourth Proportional to 125,347.48, 187,960.74 and 72,770.20

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Solution

The fourth proportional to 125,347.48, 187,960.74 and 72,770.20 is: 109,120.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,347.48 : 187,960.74 = 72,770.20 : x
  2. Step 2: Convert to fraction form
    125,347.48/187,960.74 = 72,770.20/x
  3. Step 3: Cross multiply
    125,347.48x = 187,960.74 × 72,770.20
  4. Step 4: Simplify right side
    125,347.48x = 13,677,940,641.95
  5. Step 5: Solve for x
    x = 13,677,940,641.95/125,347.48
  6. Step 6: Final answer
    x = 109,120.19

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1.5x scale

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.