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Finding the Fourth Proportional to 99,620.80, 149,512.80 and 98,843.20

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Solution

The fourth proportional to 99,620.80, 149,512.80 and 98,843.20 is: 148,345.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,620.80 : 149,512.80 = 98,843.20 : x
  2. Step 2: Convert to fraction form
    99,620.80/149,512.80 = 98,843.20/x
  3. Step 3: Cross multiply
    99,620.80x = 149,512.80 × 98,843.20
  4. Step 4: Simplify right side
    99,620.80x = 14,778,323,592.96
  5. Step 5: Solve for x
    x = 14,778,323,592.96/99,620.80
  6. Step 6: Final answer
    x = 148,345.76

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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.