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Finding the Fourth Proportional to 87,993,645.60, 131,990,468.40 and 65,318,829.60

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Solution

The fourth proportional to 87,993,645.60, 131,990,468.40 and 65,318,829.60 is: 97,978,244.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,993,645.60 : 131,990,468.40 = 65,318,829.60 : x
  2. Step 2: Convert to fraction form
    87,993,645.60/131,990,468.40 = 65,318,829.60/x
  3. Step 3: Cross multiply
    87,993,645.60x = 131,990,468.40 × 65,318,829.60
  4. Step 4: Simplify right side
    87,993,645.60x = 8,621,462,914,243,785
  5. Step 5: Solve for x
    x = 8,621,462,914,243,785/87,993,645.60
  6. Step 6: Final answer
    x = 97,978,244.40

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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.