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Finding the Fourth Proportional to 139,800.60, 209,685.21 and 38,613.04

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Solution

The fourth proportional to 139,800.60, 209,685.21 and 38,613.04 is: 57,915.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,800.60 : 209,685.21 = 38,613.04 : x
  2. Step 2: Convert to fraction form
    139,800.60/209,685.21 = 38,613.04/x
  3. Step 3: Cross multiply
    139,800.60x = 209,685.21 × 38,613.04
  4. Step 4: Simplify right side
    139,800.60x = 8,096,582,732.13
  5. Step 5: Solve for x
    x = 8,096,582,732.13/139,800.60
  6. Step 6: Final answer
    x = 57,915.22

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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.