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Finding the Fourth Proportional to 99,086.96, 136,853.57 and 65,246.72

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Solution

The fourth proportional to 99,086.96, 136,853.57 and 65,246.72 is: 90,115.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,086.96 : 136,853.57 = 65,246.72 : x
  2. Step 2: Convert to fraction form
    99,086.96/136,853.57 = 65,246.72/x
  3. Step 3: Cross multiply
    99,086.96x = 136,853.57 × 65,246.72
  4. Step 4: Simplify right side
    99,086.96x = 8,929,246,041.64
  5. Step 5: Solve for x
    x = 8,929,246,041.64/99,086.96
  6. Step 6: Final answer
    x = 90,115.25

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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.