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Finding the Fourth Proportional to 139,010.13, 191,834.39 and 75,348.18

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Solution

The fourth proportional to 139,010.13, 191,834.39 and 75,348.18 is: 103,980.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,010.13 : 191,834.39 = 75,348.18 : x
  2. Step 2: Convert to fraction form
    139,010.13/191,834.39 = 75,348.18/x
  3. Step 3: Cross multiply
    139,010.13x = 191,834.39 × 75,348.18
  4. Step 4: Simplify right side
    139,010.13x = 14,454,372,147.91
  5. Step 5: Solve for x
    x = 14,454,372,147.91/139,010.13
  6. Step 6: Final answer
    x = 103,980.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.