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Finding the Fourth Proportional to 91,388.40, 137,082.60 and 29,065.20

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Solution

The fourth proportional to 91,388.40, 137,082.60 and 29,065.20 is: 43,597.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,388.40 : 137,082.60 = 29,065.20 : x
  2. Step 2: Convert to fraction form
    91,388.40/137,082.60 = 29,065.20/x
  3. Step 3: Cross multiply
    91,388.40x = 137,082.60 × 29,065.20
  4. Step 4: Simplify right side
    91,388.40x = 3,984,333,185.52
  5. Step 5: Solve for x
    x = 3,984,333,185.52/91,388.40
  6. Step 6: Final answer
    x = 43,597.80

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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.