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Finding the Fourth Proportional to 99,804.80, 149,728.80 and 29,691.20

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Solution

The fourth proportional to 99,804.80, 149,728.80 and 29,691.20 is: 44,543.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,804.80 : 149,728.80 = 29,691.20 : x
  2. Step 2: Convert to fraction form
    99,804.80/149,728.80 = 29,691.20/x
  3. Step 3: Cross multiply
    99,804.80x = 149,728.80 × 29,691.20
  4. Step 4: Simplify right side
    99,804.80x = 4,445,627,746.56
  5. Step 5: Solve for x
    x = 4,445,627,746.56/99,804.80
  6. Step 6: Final answer
    x = 44,543.23

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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.