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Finding the Fourth Proportional to 72,428.10, 108,512.55 and 44,693.70

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Solution

The fourth proportional to 72,428.10, 108,512.55 and 44,693.70 is: 66,960.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,428.10 : 108,512.55 = 44,693.70 : x
  2. Step 2: Convert to fraction form
    72,428.10/108,512.55 = 44,693.70/x
  3. Step 3: Cross multiply
    72,428.10x = 108,512.55 × 44,693.70
  4. Step 4: Simplify right side
    72,428.10x = 4,849,827,355.94
  5. Step 5: Solve for x
    x = 4,849,827,355.94/72,428.10
  6. Step 6: Final answer
    x = 66,960.58

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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.