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Finding the Fourth Proportional to 56,981.72, 85,425.78 and 37,011.80

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Solution

The fourth proportional to 56,981.72, 85,425.78 and 37,011.80 is: 55,487.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,981.72 : 85,425.78 = 37,011.80 : x
  2. Step 2: Convert to fraction form
    56,981.72/85,425.78 = 37,011.80/x
  3. Step 3: Cross multiply
    56,981.72x = 85,425.78 × 37,011.80
  4. Step 4: Simplify right side
    56,981.72x = 3,161,761,884.20
  5. Step 5: Solve for x
    x = 3,161,761,884.20/56,981.72
  6. Step 6: Final answer
    x = 55,487.30

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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.