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Finding the Fourth Proportional to 138,445.83, 207,684.24 and 43,689.51

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Solution

The fourth proportional to 138,445.83, 207,684.24 and 43,689.51 is: 65,539.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,445.83 : 207,684.24 = 43,689.51 : x
  2. Step 2: Convert to fraction form
    138,445.83/207,684.24 = 43,689.51/x
  3. Step 3: Cross multiply
    138,445.83x = 207,684.24 × 43,689.51
  4. Step 4: Simplify right side
    138,445.83x = 9,073,622,680.32
  5. Step 5: Solve for x
    x = 9,073,622,680.32/138,445.83
  6. Step 6: Final answer
    x = 65,539.15

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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.