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Finding the Fourth Proportional to 207,279.60, 310,919.40 and 74,151.78

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Solution

The fourth proportional to 207,279.60, 310,919.40 and 74,151.78 is: 111,227.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,279.60 : 310,919.40 = 74,151.78 : x
  2. Step 2: Convert to fraction form
    207,279.60/310,919.40 = 74,151.78/x
  3. Step 3: Cross multiply
    207,279.60x = 310,919.40 × 74,151.78
  4. Step 4: Simplify right side
    207,279.60x = 23,055,226,946.53
  5. Step 5: Solve for x
    x = 23,055,226,946.53/207,279.60
  6. Step 6: Final answer
    x = 111,227.67

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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.