Home / 87,417,967.80-131,126,951.70-81,445,999.80

Finding the Fourth Proportional to 87,417,967.80, 131,126,951.70 and 81,445,999.80

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Solution

The fourth proportional to 87,417,967.80, 131,126,951.70 and 81,445,999.80 is: 122,168,999.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,417,967.80 : 131,126,951.70 = 81,445,999.80 : x
  2. Step 2: Convert to fraction form
    87,417,967.80/131,126,951.70 = 81,445,999.80/x
  3. Step 3: Cross multiply
    87,417,967.80x = 131,126,951.70 × 81,445,999.80
  4. Step 4: Simplify right side
    87,417,967.80x = 10,679,765,681,932,810
  5. Step 5: Solve for x
    x = 10,679,765,681,932,810/87,417,967.80
  6. Step 6: Final answer
    x = 122,168,999.70

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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.