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Finding the Fourth Proportional to 218,139.60, 327,209.40 and 147,637.20

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Solution

The fourth proportional to 218,139.60, 327,209.40 and 147,637.20 is: 221,455.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,139.60 : 327,209.40 = 147,637.20 : x
  2. Step 2: Convert to fraction form
    218,139.60/327,209.40 = 147,637.20/x
  3. Step 3: Cross multiply
    218,139.60x = 327,209.40 × 147,637.20
  4. Step 4: Simplify right side
    218,139.60x = 48,308,279,629.68
  5. Step 5: Solve for x
    x = 48,308,279,629.68/218,139.60
  6. Step 6: Final answer
    x = 221,455.80

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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.