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Finding the Fourth Proportional to 138,060.63, 206,959.71 and 88,000.20

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Solution

The fourth proportional to 138,060.63, 206,959.71 and 88,000.20 is: 131,916.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,060.63 : 206,959.71 = 88,000.20 : x
  2. Step 2: Convert to fraction form
    138,060.63/206,959.71 = 88,000.20/x
  3. Step 3: Cross multiply
    138,060.63x = 206,959.71 × 88,000.20
  4. Step 4: Simplify right side
    138,060.63x = 18,212,495,871.94
  5. Step 5: Solve for x
    x = 18,212,495,871.94/138,060.63
  6. Step 6: Final answer
    x = 131,916.65

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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.