Home / 52,126.80-78,190.20-31,390.80

Finding the Fourth Proportional to 52,126.80, 78,190.20 and 31,390.80

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Solution

The fourth proportional to 52,126.80, 78,190.20 and 31,390.80 is: 47,086.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,126.80 : 78,190.20 = 31,390.80 : x
  2. Step 2: Convert to fraction form
    52,126.80/78,190.20 = 31,390.80/x
  3. Step 3: Cross multiply
    52,126.80x = 78,190.20 × 31,390.80
  4. Step 4: Simplify right side
    52,126.80x = 2,454,452,930.16
  5. Step 5: Solve for x
    x = 2,454,452,930.16/52,126.80
  6. Step 6: Final answer
    x = 47,086.20

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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.