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Finding the Fourth Proportional to 56,658.70, 85,020.45 and 39,141.10

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Solution

The fourth proportional to 56,658.70, 85,020.45 and 39,141.10 is: 58,734.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,658.70 : 85,020.45 = 39,141.10 : x
  2. Step 2: Convert to fraction form
    56,658.70/85,020.45 = 39,141.10/x
  3. Step 3: Cross multiply
    56,658.70x = 85,020.45 × 39,141.10
  4. Step 4: Simplify right side
    56,658.70x = 3,327,793,935.50
  5. Step 5: Solve for x
    x = 3,327,793,935.50/56,658.70
  6. Step 6: Final answer
    x = 58,734.03

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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.