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Finding the Fourth Proportional to 99,612.80, 149,500.80 and 98,835.20

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Solution

The fourth proportional to 99,612.80, 149,500.80 and 98,835.20 is: 148,333.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,612.80 : 149,500.80 = 98,835.20 : x
  2. Step 2: Convert to fraction form
    99,612.80/149,500.80 = 98,835.20/x
  3. Step 3: Cross multiply
    99,612.80x = 149,500.80 × 98,835.20
  4. Step 4: Simplify right side
    99,612.80x = 14,775,941,468.16
  5. Step 5: Solve for x
    x = 14,775,941,468.16/99,612.80
  6. Step 6: Final answer
    x = 148,333.76

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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.