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Finding the Fourth Proportional to 72,346.96, 99,772.05 and 49,645.90

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Solution

The fourth proportional to 72,346.96, 99,772.05 and 49,645.90 is: 68,465.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,346.96 : 99,772.05 = 49,645.90 : x
  2. Step 2: Convert to fraction form
    72,346.96/99,772.05 = 49,645.90/x
  3. Step 3: Cross multiply
    72,346.96x = 99,772.05 × 49,645.90
  4. Step 4: Simplify right side
    72,346.96x = 4,953,273,217.10
  5. Step 5: Solve for x
    x = 4,953,273,217.10/72,346.96
  6. Step 6: Final answer
    x = 68,465.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.