Home / 51,803.20-77,781.60-40,129.60

Finding the Fourth Proportional to 51,803.20, 77,781.60 and 40,129.60

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Solution

The fourth proportional to 51,803.20, 77,781.60 and 40,129.60 is: 60,253.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,803.20 : 77,781.60 = 40,129.60 : x
  2. Step 2: Convert to fraction form
    51,803.20/77,781.60 = 40,129.60/x
  3. Step 3: Cross multiply
    51,803.20x = 77,781.60 × 40,129.60
  4. Step 4: Simplify right side
    51,803.20x = 3,121,344,495.36
  5. Step 5: Solve for x
    x = 3,121,344,495.36/51,803.20
  6. Step 6: Final answer
    x = 60,253.89

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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.