Home / 78,229,350.60-117,338,777.10-20,720,387.40

Finding the Fourth Proportional to 78,229,350.60, 117,338,777.10 and 20,720,387.40

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Solution

The fourth proportional to 78,229,350.60, 117,338,777.10 and 20,720,387.40 is: 31,079,190.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,229,350.60 : 117,338,777.10 = 20,720,387.40 : x
  2. Step 2: Convert to fraction form
    78,229,350.60/117,338,777.10 = 20,720,387.40/x
  3. Step 3: Cross multiply
    78,229,350.60x = 117,338,777.10 × 20,720,387.40
  4. Step 4: Simplify right side
    78,229,350.60x = 2,431,304,918,554,248
  5. Step 5: Solve for x
    x = 2,431,304,918,554,248/78,229,350.60
  6. Step 6: Final answer
    x = 31,079,190.87

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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.