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Finding the Fourth Proportional to 86,576.31, 129,893.63 and 42,194.79

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Solution

The fourth proportional to 86,576.31, 129,893.63 and 42,194.79 is: 63,306.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,576.31 : 129,893.63 = 42,194.79 : x
  2. Step 2: Convert to fraction form
    86,576.31/129,893.63 = 42,194.79/x
  3. Step 3: Cross multiply
    86,576.31x = 129,893.63 × 42,194.79
  4. Step 4: Simplify right side
    86,576.31x = 5,480,834,229.21
  5. Step 5: Solve for x
    x = 5,480,834,229.21/86,576.31
  6. Step 6: Final answer
    x = 63,306.40

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1.5x scale

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.