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Finding the Fourth Proportional to 218,078.40, 327,117.60 and 143,428.80

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Solution

The fourth proportional to 218,078.40, 327,117.60 and 143,428.80 is: 215,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,078.40 : 327,117.60 = 143,428.80 : x
  2. Step 2: Convert to fraction form
    218,078.40/327,117.60 = 143,428.80/x
  3. Step 3: Cross multiply
    218,078.40x = 327,117.60 × 143,428.80
  4. Step 4: Simplify right side
    218,078.40x = 46,918,084,826.88
  5. Step 5: Solve for x
    x = 46,918,084,826.88/218,078.40
  6. Step 6: Final answer
    x = 215,143.20

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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.