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Finding the Fourth Proportional to 91,211.92, 136,808.25 and 43,169.02

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Solution

The fourth proportional to 91,211.92, 136,808.25 and 43,169.02 is: 64,748.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,211.92 : 136,808.25 = 43,169.02 : x
  2. Step 2: Convert to fraction form
    91,211.92/136,808.25 = 43,169.02/x
  3. Step 3: Cross multiply
    91,211.92x = 136,808.25 × 43,169.02
  4. Step 4: Simplify right side
    91,211.92x = 5,905,878,080.42
  5. Step 5: Solve for x
    x = 5,905,878,080.42/91,211.92
  6. Step 6: Final answer
    x = 64,748.97

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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.