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Finding the Fourth Proportional to 99,349.80, 148,851.90 and 81,724.20

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Solution

The fourth proportional to 99,349.80, 148,851.90 and 81,724.20 is: 122,444.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,349.80 : 148,851.90 = 81,724.20 : x
  2. Step 2: Convert to fraction form
    99,349.80/148,851.90 = 81,724.20/x
  3. Step 3: Cross multiply
    99,349.80x = 148,851.90 × 81,724.20
  4. Step 4: Simplify right side
    99,349.80x = 12,164,802,445.98
  5. Step 5: Solve for x
    x = 12,164,802,445.98/99,349.80
  6. Step 6: Final answer
    x = 122,444.16

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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.