Home / 78,178.74-117,198.51-28,247.70

Finding the Fourth Proportional to 78,178.74, 117,198.51 and 28,247.70

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Solution

The fourth proportional to 78,178.74, 117,198.51 and 28,247.70 is: 42,346.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,178.74 : 117,198.51 = 28,247.70 : x
  2. Step 2: Convert to fraction form
    78,178.74/117,198.51 = 28,247.70/x
  3. Step 3: Cross multiply
    78,178.74x = 117,198.51 × 28,247.70
  4. Step 4: Simplify right side
    78,178.74x = 3,310,588,350.93
  5. Step 5: Solve for x
    x = 3,310,588,350.93/78,178.74
  6. Step 6: Final answer
    x = 42,346.40

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1.5x scale

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.