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Finding the Fourth Proportional to 138,431.08, 207,612.06 and 44,963.56

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Solution

The fourth proportional to 138,431.08, 207,612.06 and 44,963.56 is: 67,434.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,431.08 : 207,612.06 = 44,963.56 : x
  2. Step 2: Convert to fraction form
    138,431.08/207,612.06 = 44,963.56/x
  3. Step 3: Cross multiply
    138,431.08x = 207,612.06 × 44,963.56
  4. Step 4: Simplify right side
    138,431.08x = 9,334,977,316.53
  5. Step 5: Solve for x
    x = 9,334,977,316.53/138,431.08
  6. Step 6: Final answer
    x = 67,434.11

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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.