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Finding the Fourth Proportional to 139,418.59, 192,397.28 and 75,756.39

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Solution

The fourth proportional to 139,418.59, 192,397.28 and 75,756.39 is: 104,543.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,418.59 : 192,397.28 = 75,756.39 : x
  2. Step 2: Convert to fraction form
    139,418.59/192,397.28 = 75,756.39/x
  3. Step 3: Cross multiply
    139,418.59x = 192,397.28 × 75,756.39
  4. Step 4: Simplify right side
    139,418.59x = 14,575,323,378.62
  5. Step 5: Solve for x
    x = 14,575,323,378.62/139,418.59
  6. Step 6: Final answer
    x = 104,543.61

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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.