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Finding the Fourth Proportional to 91,398.20, 137,097.30 and 79,734.20

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Solution

The fourth proportional to 91,398.20, 137,097.30 and 79,734.20 is: 119,601.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,398.20 : 137,097.30 = 79,734.20 : x
  2. Step 2: Convert to fraction form
    91,398.20/137,097.30 = 79,734.20/x
  3. Step 3: Cross multiply
    91,398.20x = 137,097.30 × 79,734.20
  4. Step 4: Simplify right side
    91,398.20x = 10,931,343,537.66
  5. Step 5: Solve for x
    x = 10,931,343,537.66/91,398.20
  6. Step 6: Final answer
    x = 119,601.30

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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.