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Finding the Fourth Proportional to 114,630.30, 171,945.45 and 72,639.90

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Solution

The fourth proportional to 114,630.30, 171,945.45 and 72,639.90 is: 108,959.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    114,630.30 : 171,945.45 = 72,639.90 : x
  2. Step 2: Convert to fraction form
    114,630.30/171,945.45 = 72,639.90/x
  3. Step 3: Cross multiply
    114,630.30x = 171,945.45 × 72,639.90
  4. Step 4: Simplify right side
    114,630.30x = 12,490,100,293.46
  5. Step 5: Solve for x
    x = 12,490,100,293.46/114,630.30
  6. Step 6: Final answer
    x = 108,959.85

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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.