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Finding the Fourth Proportional to 72,432, 108,657.72 and 30,888.72

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Solution

The fourth proportional to 72,432, 108,657.72 and 30,888.72 is: 46,337.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,432 : 108,657.72 = 30,888.72 : x
  2. Step 2: Convert to fraction form
    72,432/108,657.72 = 30,888.72/x
  3. Step 3: Cross multiply
    72,432x = 108,657.72 × 30,888.72
  4. Step 4: Simplify right side
    72,432x = 3,356,297,888.92
  5. Step 5: Solve for x
    x = 3,356,297,888.92/72,432
  6. Step 6: Final answer
    x = 46,337.23

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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.