Home / 78,807,838.20-118,211,757.30-71,155,087.80

Finding the Fourth Proportional to 78,807,838.20, 118,211,757.30 and 71,155,087.80

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Solution

The fourth proportional to 78,807,838.20, 118,211,757.30 and 71,155,087.80 is: 106,732,631.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,807,838.20 : 118,211,757.30 = 71,155,087.80 : x
  2. Step 2: Convert to fraction form
    78,807,838.20/118,211,757.30 = 71,155,087.80/x
  3. Step 3: Cross multiply
    78,807,838.20x = 118,211,757.30 × 71,155,087.80
  4. Step 4: Simplify right side
    78,807,838.20x = 8,411,367,969,673,790
  5. Step 5: Solve for x
    x = 8,411,367,969,673,790/78,807,838.20
  6. Step 6: Final answer
    x = 106,732,631.70

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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.