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Finding the Fourth Proportional to 80,708.00, 121,062.60 and 28,117.40

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Solution

The fourth proportional to 80,708.00, 121,062.60 and 28,117.40 is: 42,176.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,708.00 : 121,062.60 = 28,117.40 : x
  2. Step 2: Convert to fraction form
    80,708.00/121,062.60 = 28,117.40/x
  3. Step 3: Cross multiply
    80,708.00x = 121,062.60 × 28,117.40
  4. Step 4: Simplify right side
    80,708.00x = 3,403,964,943.93
  5. Step 5: Solve for x
    x = 3,403,964,943.93/80,708.00
  6. Step 6: Final answer
    x = 42,176.30

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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.