Home / 86,228,742.70-129,343,114.05-81,126,909.10

Finding the Fourth Proportional to 86,228,742.70, 129,343,114.05 and 81,126,909.10

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Solution

The fourth proportional to 86,228,742.70, 129,343,114.05 and 81,126,909.10 is: 121,690,363.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,228,742.70 : 129,343,114.05 = 81,126,909.10 : x
  2. Step 2: Convert to fraction form
    86,228,742.70/129,343,114.05 = 81,126,909.10/x
  3. Step 3: Cross multiply
    86,228,742.70x = 129,343,114.05 × 81,126,909.10
  4. Step 4: Simplify right side
    86,228,742.70x = 10,493,207,056,245,282
  5. Step 5: Solve for x
    x = 10,493,207,056,245,282/86,228,742.70
  6. Step 6: Final answer
    x = 121,690,363.65

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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.