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Finding the Fourth Proportional to 138,551.40, 207,308.12 and 98,662.58

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Solution

The fourth proportional to 138,551.40, 207,308.12 and 98,662.58 is: 147,624.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,551.40 : 207,308.12 = 98,662.58 : x
  2. Step 2: Convert to fraction form
    138,551.40/207,308.12 = 98,662.58/x
  3. Step 3: Cross multiply
    138,551.40x = 207,308.12 × 98,662.58
  4. Step 4: Simplify right side
    138,551.40x = 20,453,553,186.61
  5. Step 5: Solve for x
    x = 20,453,553,186.61/138,551.40
  6. Step 6: Final answer
    x = 147,624.29

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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.