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Finding the Fourth Proportional to 87,399,287.80, 131,098,931.70 and 87,399,287.80

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Solution

The fourth proportional to 87,399,287.80, 131,098,931.70 and 87,399,287.80 is: 131,098,931.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,399,287.80 : 131,098,931.70 = 87,399,287.80 : x
  2. Step 2: Convert to fraction form
    87,399,287.80/131,098,931.70 = 87,399,287.80/x
  3. Step 3: Cross multiply
    87,399,287.80x = 131,098,931.70 × 87,399,287.80
  4. Step 4: Simplify right side
    87,399,287.80x = 11,457,953,261,920,844
  5. Step 5: Solve for x
    x = 11,457,953,261,920,844/87,399,287.80
  6. Step 6: Final answer
    x = 131,098,931.70

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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.