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Finding the Fourth Proportional to 91,858,915.80, 137,788,373.70 and 82,505,554.20

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Solution

The fourth proportional to 91,858,915.80, 137,788,373.70 and 82,505,554.20 is: 123,758,331.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,858,915.80 : 137,788,373.70 = 82,505,554.20 : x
  2. Step 2: Convert to fraction form
    91,858,915.80/137,788,373.70 = 82,505,554.20/x
  3. Step 3: Cross multiply
    91,858,915.80x = 137,788,373.70 × 82,505,554.20
  4. Step 4: Simplify right side
    91,858,915.80x = 11,368,306,134,435,204
  5. Step 5: Solve for x
    x = 11,368,306,134,435,204/91,858,915.80
  6. Step 6: Final answer
    x = 123,758,331.30

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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.