Home / 78,748.18-117,990.77-55,332.70

Finding the Fourth Proportional to 78,748.18, 117,990.77 and 55,332.70

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Solution

The fourth proportional to 78,748.18, 117,990.77 and 55,332.70 is: 82,906.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,748.18 : 117,990.77 = 55,332.70 : x
  2. Step 2: Convert to fraction form
    78,748.18/117,990.77 = 55,332.70/x
  3. Step 3: Cross multiply
    78,748.18x = 117,990.77 × 55,332.70
  4. Step 4: Simplify right side
    78,748.18x = 6,528,747,722.53
  5. Step 5: Solve for x
    x = 6,528,747,722.53/78,748.18
  6. Step 6: Final answer
    x = 82,906.65

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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.