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Finding the Fourth Proportional to 99,207.72, 136,827.42 and 65,251.06

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Solution

The fourth proportional to 99,207.72, 136,827.42 and 65,251.06 is: 89,994.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,207.72 : 136,827.42 = 65,251.06 : x
  2. Step 2: Convert to fraction form
    99,207.72/136,827.42 = 65,251.06/x
  3. Step 3: Cross multiply
    99,207.72x = 136,827.42 × 65,251.06
  4. Step 4: Simplify right side
    99,207.72x = 8,928,134,192.07
  5. Step 5: Solve for x
    x = 8,928,134,192.07/99,207.72
  6. Step 6: Final answer
    x = 89,994.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.