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Finding the Fourth Proportional to 139,382.48, 192,348.05 and 75,720.33

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Solution

The fourth proportional to 139,382.48, 192,348.05 and 75,720.33 is: 104,494.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,382.48 : 192,348.05 = 75,720.33 : x
  2. Step 2: Convert to fraction form
    139,382.48/192,348.05 = 75,720.33/x
  3. Step 3: Cross multiply
    139,382.48x = 192,348.05 × 75,720.33
  4. Step 4: Simplify right side
    139,382.48x = 14,564,657,820.86
  5. Step 5: Solve for x
    x = 14,564,657,820.86/139,382.48
  6. Step 6: Final answer
    x = 104,494.18

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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.