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Finding the Fourth Proportional to 140,425.84, 210,691.38 and 72,915.76

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Solution

The fourth proportional to 140,425.84, 210,691.38 and 72,915.76 is: 109,400.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,425.84 : 210,691.38 = 72,915.76 : x
  2. Step 2: Convert to fraction form
    140,425.84/210,691.38 = 72,915.76/x
  3. Step 3: Cross multiply
    140,425.84x = 210,691.38 × 72,915.76
  4. Step 4: Simplify right side
    140,425.84x = 15,362,722,098.15
  5. Step 5: Solve for x
    x = 15,362,722,098.15/140,425.84
  6. Step 6: Final answer
    x = 109,400.96

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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.