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Finding the Fourth Proportional to 99,371.92, 137,099.80 and 67,485.48

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Solution

The fourth proportional to 99,371.92, 137,099.80 and 67,485.48 is: 93,107.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,371.92 : 137,099.80 = 67,485.48 : x
  2. Step 2: Convert to fraction form
    99,371.92/137,099.80 = 67,485.48/x
  3. Step 3: Cross multiply
    99,371.92x = 137,099.80 × 67,485.48
  4. Step 4: Simplify right side
    99,371.92x = 9,252,245,810.90
  5. Step 5: Solve for x
    x = 9,252,245,810.90/99,371.92
  6. Step 6: Final answer
    x = 93,107.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.