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Finding the Fourth Proportional to 261,066.94, 391,600.71 and 71,528.95

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Solution

The fourth proportional to 261,066.94, 391,600.71 and 71,528.95 is: 107,293.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,066.94 : 391,600.71 = 71,528.95 : x
  2. Step 2: Convert to fraction form
    261,066.94/391,600.71 = 71,528.95/x
  3. Step 3: Cross multiply
    261,066.94x = 391,600.71 × 71,528.95
  4. Step 4: Simplify right side
    261,066.94x = 28,010,787,605.55
  5. Step 5: Solve for x
    x = 28,010,787,605.55/261,066.94
  6. Step 6: Final answer
    x = 107,293.51

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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.