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Finding the Fourth Proportional to 139,332.84, 192,279.87 and 75,671.70

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Solution

The fourth proportional to 139,332.84, 192,279.87 and 75,671.70 is: 104,427.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,332.84 : 192,279.87 = 75,671.70 : x
  2. Step 2: Convert to fraction form
    139,332.84/192,279.87 = 75,671.70/x
  3. Step 3: Cross multiply
    139,332.84x = 192,279.87 × 75,671.70
  4. Step 4: Simplify right side
    139,332.84x = 14,550,144,638.68
  5. Step 5: Solve for x
    x = 14,550,144,638.68/139,332.84
  6. Step 6: Final answer
    x = 104,427.25

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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.