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Finding the Fourth Proportional to 87,318,905.80, 130,978,358.70 and 60,109,126.60

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Solution

The fourth proportional to 87,318,905.80, 130,978,358.70 and 60,109,126.60 is: 90,163,689.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,318,905.80 : 130,978,358.70 = 60,109,126.60 : x
  2. Step 2: Convert to fraction form
    87,318,905.80/130,978,358.70 = 60,109,126.60/x
  3. Step 3: Cross multiply
    87,318,905.80x = 130,978,358.70 × 60,109,126.60
  4. Step 4: Simplify right side
    87,318,905.80x = 7,872,994,744,958,512
  5. Step 5: Solve for x
    x = 7,872,994,744,958,512/87,318,905.80
  6. Step 6: Final answer
    x = 90,163,689.90

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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.