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Finding the Fourth Proportional to 139,516.48, 209,270.08 and 60,630.78

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Solution

The fourth proportional to 139,516.48, 209,270.08 and 60,630.78 is: 90,944.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,516.48 : 209,270.08 = 60,630.78 : x
  2. Step 2: Convert to fraction form
    139,516.48/209,270.08 = 60,630.78/x
  3. Step 3: Cross multiply
    139,516.48x = 209,270.08 × 60,630.78
  4. Step 4: Simplify right side
    139,516.48x = 12,688,207,864.47
  5. Step 5: Solve for x
    x = 12,688,207,864.47/139,516.48
  6. Step 6: Final answer
    x = 90,944.15

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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.