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Finding the Fourth Proportional to 139,292.96, 192,221.39 and 75,630.81

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Solution

The fourth proportional to 139,292.96, 192,221.39 and 75,630.81 is: 104,368.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,292.96 : 192,221.39 = 75,630.81 : x
  2. Step 2: Convert to fraction form
    139,292.96/192,221.39 = 75,630.81/x
  3. Step 3: Cross multiply
    139,292.96x = 192,221.39 × 75,630.81
  4. Step 4: Simplify right side
    139,292.96x = 14,537,859,425.03
  5. Step 5: Solve for x
    x = 14,537,859,425.03/139,292.96
  6. Step 6: Final answer
    x = 104,368.95

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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.