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Finding the Fourth Proportional to 82,889.56, 124,335.20 and 66,354.69

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Solution

The fourth proportional to 82,889.56, 124,335.20 and 66,354.69 is: 99,532.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,889.56 : 124,335.20 = 66,354.69 : x
  2. Step 2: Convert to fraction form
    82,889.56/124,335.20 = 66,354.69/x
  3. Step 3: Cross multiply
    82,889.56x = 124,335.20 × 66,354.69
  4. Step 4: Simplify right side
    82,889.56x = 8,250,223,652.09
  5. Step 5: Solve for x
    x = 8,250,223,652.09/82,889.56
  6. Step 6: Final answer
    x = 99,532.72

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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.