Home / 78,748,867.80-118,123,301.70-40,485,115.80

Finding the Fourth Proportional to 78,748,867.80, 118,123,301.70 and 40,485,115.80

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Solution

The fourth proportional to 78,748,867.80, 118,123,301.70 and 40,485,115.80 is: 60,727,673.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,748,867.80 : 118,123,301.70 = 40,485,115.80 : x
  2. Step 2: Convert to fraction form
    78,748,867.80/118,123,301.70 = 40,485,115.80/x
  3. Step 3: Cross multiply
    78,748,867.80x = 118,123,301.70 × 40,485,115.80
  4. Step 4: Simplify right side
    78,748,867.80x = 4,782,235,548,002,837
  5. Step 5: Solve for x
    x = 4,782,235,548,002,837/78,748,867.80
  6. Step 6: Final answer
    x = 60,727,673.70

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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.