Home / 86,228,720.20-129,343,080.30-81,126,886.60

Finding the Fourth Proportional to 86,228,720.20, 129,343,080.30 and 81,126,886.60

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Solution

The fourth proportional to 86,228,720.20, 129,343,080.30 and 81,126,886.60 is: 121,690,329.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,228,720.20 : 129,343,080.30 = 81,126,886.60 : x
  2. Step 2: Convert to fraction form
    86,228,720.20/129,343,080.30 = 81,126,886.60/x
  3. Step 3: Cross multiply
    86,228,720.20x = 129,343,080.30 × 81,126,886.60
  4. Step 4: Simplify right side
    86,228,720.20x = 10,493,201,407,992,792
  5. Step 5: Solve for x
    x = 10,493,201,407,992,792/86,228,720.20
  6. Step 6: Final answer
    x = 121,690,329.90

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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.