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Finding the Fourth Proportional to 139,443.26, 192,432.92 and 75,781.06

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Solution

The fourth proportional to 139,443.26, 192,432.92 and 75,781.06 is: 104,578.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,443.26 : 192,432.92 = 75,781.06 : x
  2. Step 2: Convert to fraction form
    139,443.26/192,432.92 = 75,781.06/x
  3. Step 3: Cross multiply
    139,443.26x = 192,432.92 × 75,781.06
  4. Step 4: Simplify right side
    139,443.26x = 14,582,770,656.50
  5. Step 5: Solve for x
    x = 14,582,770,656.50/139,443.26
  6. Step 6: Final answer
    x = 104,578.53

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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.