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Finding the Fourth Proportional to 261,200.39, 391,275.59 and 136,278.95

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Solution

The fourth proportional to 261,200.39, 391,275.59 and 136,278.95 is: 204,144.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,200.39 : 391,275.59 = 136,278.95 : x
  2. Step 2: Convert to fraction form
    261,200.39/391,275.59 = 136,278.95/x
  3. Step 3: Cross multiply
    261,200.39x = 391,275.59 × 136,278.95
  4. Step 4: Simplify right side
    261,200.39x = 53,322,623,928.06
  5. Step 5: Solve for x
    x = 53,322,623,928.06/261,200.39
  6. Step 6: Final answer
    x = 204,144.51

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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.