Home / 86,228,719.20-129,343,078.80-81,126,885.60

Finding the Fourth Proportional to 86,228,719.20, 129,343,078.80 and 81,126,885.60

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Solution

The fourth proportional to 86,228,719.20, 129,343,078.80 and 81,126,885.60 is: 121,690,328.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,228,719.20 : 129,343,078.80 = 81,126,885.60 : x
  2. Step 2: Convert to fraction form
    86,228,719.20/129,343,078.80 = 81,126,885.60/x
  3. Step 3: Cross multiply
    86,228,719.20x = 129,343,078.80 × 81,126,885.60
  4. Step 4: Simplify right side
    86,228,719.20x = 10,493,201,156,959,384
  5. Step 5: Solve for x
    x = 10,493,201,156,959,384/86,228,719.20
  6. Step 6: Final answer
    x = 121,690,328.40

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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.