Home / 77,280.20-115,920.30-53,433.80

Finding the Fourth Proportional to 77,280.20, 115,920.30 and 53,433.80

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Solution

The fourth proportional to 77,280.20, 115,920.30 and 53,433.80 is: 80,150.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,280.20 : 115,920.30 = 53,433.80 : x
  2. Step 2: Convert to fraction form
    77,280.20/115,920.30 = 53,433.80/x
  3. Step 3: Cross multiply
    77,280.20x = 115,920.30 × 53,433.80
  4. Step 4: Simplify right side
    77,280.20x = 6,194,062,126.14
  5. Step 5: Solve for x
    x = 6,194,062,126.14/77,280.20
  6. Step 6: Final answer
    x = 80,150.70

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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.