Home / 84,515,728.60-126,868,071.30-65,431,091.80

Finding the Fourth Proportional to 84,515,728.60, 126,868,071.30 and 65,431,091.80

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Solution

The fourth proportional to 84,515,728.60, 126,868,071.30 and 65,431,091.80 is: 98,219,781.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,515,728.60 : 126,868,071.30 = 65,431,091.80 : x
  2. Step 2: Convert to fraction form
    84,515,728.60/126,868,071.30 = 65,431,091.80/x
  3. Step 3: Cross multiply
    84,515,728.60x = 126,868,071.30 × 65,431,091.80
  4. Step 4: Simplify right side
    84,515,728.60x = 8,301,116,419,719,245
  5. Step 5: Solve for x
    x = 8,301,116,419,719,245/84,515,728.60
  6. Step 6: Final answer
    x = 98,219,781.78

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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.