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Finding the Fourth Proportional to 87,911,999.80, 131,867,999.70 and 60,702,220.60

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Solution

The fourth proportional to 87,911,999.80, 131,867,999.70 and 60,702,220.60 is: 91,053,330.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,911,999.80 : 131,867,999.70 = 60,702,220.60 : x
  2. Step 2: Convert to fraction form
    87,911,999.80/131,867,999.70 = 60,702,220.60/x
  3. Step 3: Cross multiply
    87,911,999.80x = 131,867,999.70 × 60,702,220.60
  4. Step 4: Simplify right side
    87,911,999.80x = 8,004,680,407,870,134
  5. Step 5: Solve for x
    x = 8,004,680,407,870,134/87,911,999.80
  6. Step 6: Final answer
    x = 91,053,330.90

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1.5x scale

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.