Home / 86,173,772.40-129,260,658.60-83,782,287.90

Finding the Fourth Proportional to 86,173,772.40, 129,260,658.60 and 83,782,287.90

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Solution

The fourth proportional to 86,173,772.40, 129,260,658.60 and 83,782,287.90 is: 125,673,431.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,173,772.40 : 129,260,658.60 = 83,782,287.90 : x
  2. Step 2: Convert to fraction form
    86,173,772.40/129,260,658.60 = 83,782,287.90/x
  3. Step 3: Cross multiply
    86,173,772.40x = 129,260,658.60 × 83,782,287.90
  4. Step 4: Simplify right side
    86,173,772.40x = 10,829,753,712,968,812
  5. Step 5: Solve for x
    x = 10,829,753,712,968,812/86,173,772.40
  6. Step 6: Final answer
    x = 125,673,431.85

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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.