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Finding the Fourth Proportional to 138,808.76, 207,701.62 and 98,162.15

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Solution

The fourth proportional to 138,808.76, 207,701.62 and 98,162.15 is: 146,881.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,808.76 : 207,701.62 = 98,162.15 : x
  2. Step 2: Convert to fraction form
    138,808.76/207,701.62 = 98,162.15/x
  3. Step 3: Cross multiply
    138,808.76x = 207,701.62 × 98,162.15
  4. Step 4: Simplify right side
    138,808.76x = 20,388,436,293.77
  5. Step 5: Solve for x
    x = 20,388,436,293.77/138,808.76
  6. Step 6: Final answer
    x = 146,881.49

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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.