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Finding the Fourth Proportional to 99,728.53, 138,207.60 and 97,836.10

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Solution

The fourth proportional to 99,728.53, 138,207.60 and 97,836.10 is: 135,585.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,728.53 : 138,207.60 = 97,836.10 : x
  2. Step 2: Convert to fraction form
    99,728.53/138,207.60 = 97,836.10/x
  3. Step 3: Cross multiply
    99,728.53x = 138,207.60 × 97,836.10
  4. Step 4: Simplify right side
    99,728.53x = 13,521,692,473.43
  5. Step 5: Solve for x
    x = 13,521,692,473.43/99,728.53
  6. Step 6: Final answer
    x = 135,585.00

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.