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Finding the Fourth Proportional to 138,558.74, 207,319.07 and 98,669.88

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Solution

The fourth proportional to 138,558.74, 207,319.07 and 98,669.88 is: 147,635.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,558.74 : 207,319.07 = 98,669.88 : x
  2. Step 2: Convert to fraction form
    138,558.74/207,319.07 = 98,669.88/x
  3. Step 3: Cross multiply
    138,558.74x = 207,319.07 × 98,669.88
  4. Step 4: Simplify right side
    138,558.74x = 20,456,148,005.29
  5. Step 5: Solve for x
    x = 20,456,148,005.29/138,558.74
  6. Step 6: Final answer
    x = 147,635.21

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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.