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Finding the Fourth Proportional to 261,066.80, 391,600.50 and 71,528.78

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Solution

The fourth proportional to 261,066.80, 391,600.50 and 71,528.78 is: 107,293.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,066.80 : 391,600.50 = 71,528.78 : x
  2. Step 2: Convert to fraction form
    261,066.80/391,600.50 = 71,528.78/x
  3. Step 3: Cross multiply
    261,066.80x = 391,600.50 × 71,528.78
  4. Step 4: Simplify right side
    261,066.80x = 28,010,704,054.39
  5. Step 5: Solve for x
    x = 28,010,704,054.39/261,066.80
  6. Step 6: Final answer
    x = 107,293.25

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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.