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Finding the Fourth Proportional to 72,555.95, 108,875.94 and 30,432.28

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Solution

The fourth proportional to 72,555.95, 108,875.94 and 30,432.28 is: 45,666.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,555.95 : 108,875.94 = 30,432.28 : x
  2. Step 2: Convert to fraction form
    72,555.95/108,875.94 = 30,432.28/x
  3. Step 3: Cross multiply
    72,555.95x = 108,875.94 × 30,432.28
  4. Step 4: Simplify right side
    72,555.95x = 3,313,342,394.80
  5. Step 5: Solve for x
    x = 3,313,342,394.80/72,555.95
  6. Step 6: Final answer
    x = 45,666.04

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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.