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Finding the Fourth Proportional to 91,372.80, 137,059.20 and 49,382.40

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Solution

The fourth proportional to 91,372.80, 137,059.20 and 49,382.40 is: 74,073.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,372.80 : 137,059.20 = 49,382.40 : x
  2. Step 2: Convert to fraction form
    91,372.80/137,059.20 = 49,382.40/x
  3. Step 3: Cross multiply
    91,372.80x = 137,059.20 × 49,382.40
  4. Step 4: Simplify right side
    91,372.80x = 6,768,312,238.08
  5. Step 5: Solve for x
    x = 6,768,312,238.08/91,372.80
  6. Step 6: Final answer
    x = 74,073.60

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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.