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Finding the Fourth Proportional to 56,687.61, 85,064.27 and 28,609.86

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Solution

The fourth proportional to 56,687.61, 85,064.27 and 28,609.86 is: 42,931.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,687.61 : 85,064.27 = 28,609.86 : x
  2. Step 2: Convert to fraction form
    56,687.61/85,064.27 = 28,609.86/x
  3. Step 3: Cross multiply
    56,687.61x = 85,064.27 × 28,609.86
  4. Step 4: Simplify right side
    56,687.61x = 2,433,676,712.65
  5. Step 5: Solve for x
    x = 2,433,676,712.65/56,687.61
  6. Step 6: Final answer
    x = 42,931.37

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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.