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Finding the Fourth Proportional to 139,012.20, 191,837.16 and 75,349.71

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Solution

The fourth proportional to 139,012.20, 191,837.16 and 75,349.71 is: 103,982.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,012.20 : 191,837.16 = 75,349.71 : x
  2. Step 2: Convert to fraction form
    139,012.20/191,837.16 = 75,349.71/x
  3. Step 3: Cross multiply
    139,012.20x = 191,837.16 × 75,349.71
  4. Step 4: Simplify right side
    139,012.20x = 14,454,874,373.22
  5. Step 5: Solve for x
    x = 14,454,874,373.22/139,012.20
  6. Step 6: Final answer
    x = 103,982.78

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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.