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Finding the Fourth Proportional to 72,368.90, 108,520.95 and 32,905.70

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Solution

The fourth proportional to 72,368.90, 108,520.95 and 32,905.70 is: 49,343.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,368.90 : 108,520.95 = 32,905.70 : x
  2. Step 2: Convert to fraction form
    72,368.90/108,520.95 = 32,905.70/x
  3. Step 3: Cross multiply
    72,368.90x = 108,520.95 × 32,905.70
  4. Step 4: Simplify right side
    72,368.90x = 3,570,957,824.42
  5. Step 5: Solve for x
    x = 3,570,957,824.42/72,368.90
  6. Step 6: Final answer
    x = 49,343.82

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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.