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Finding the Fourth Proportional to 99,217, 136,938.90 and 60,988.60

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Solution

The fourth proportional to 99,217, 136,938.90 and 60,988.60 is: 84,176.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,217 : 136,938.90 = 60,988.60 : x
  2. Step 2: Convert to fraction form
    99,217/136,938.90 = 60,988.60/x
  3. Step 3: Cross multiply
    99,217x = 136,938.90 × 60,988.60
  4. Step 4: Simplify right side
    99,217x = 8,351,711,796.54
  5. Step 5: Solve for x
    x = 8,351,711,796.54/99,217
  6. Step 6: Final answer
    x = 84,176.22

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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.