Home / 56,615.22-78,129.97-31,122.66

Finding the Fourth Proportional to 56,615.22, 78,129.97 and 31,122.66

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Solution

The fourth proportional to 56,615.22, 78,129.97 and 31,122.66 is: 42,949.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,615.22 : 78,129.97 = 31,122.66 : x
  2. Step 2: Convert to fraction form
    56,615.22/78,129.97 = 31,122.66/x
  3. Step 3: Cross multiply
    56,615.22x = 78,129.97 × 31,122.66
  4. Step 4: Simplify right side
    56,615.22x = 2,431,612,101.47
  5. Step 5: Solve for x
    x = 2,431,612,101.47/56,615.22
  6. Step 6: Final answer
    x = 42,949.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.