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Finding the Fourth Proportional to 156,963.90, 235,445.85 and 137,280.90

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Solution

The fourth proportional to 156,963.90, 235,445.85 and 137,280.90 is: 205,921.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,963.90 : 235,445.85 = 137,280.90 : x
  2. Step 2: Convert to fraction form
    156,963.90/235,445.85 = 137,280.90/x
  3. Step 3: Cross multiply
    156,963.90x = 235,445.85 × 137,280.90
  4. Step 4: Simplify right side
    156,963.90x = 32,322,218,189.27
  5. Step 5: Solve for x
    x = 32,322,218,189.27/156,963.90
  6. Step 6: Final answer
    x = 205,921.35

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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.