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Finding the Fourth Proportional to 139,193.60, 192,087.70 and 75,531.40

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Solution

The fourth proportional to 139,193.60, 192,087.70 and 75,531.40 is: 104,233.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,193.60 : 192,087.70 = 75,531.40 : x
  2. Step 2: Convert to fraction form
    139,193.60/192,087.70 = 75,531.40/x
  3. Step 3: Cross multiply
    139,193.60x = 192,087.70 × 75,531.40
  4. Step 4: Simplify right side
    139,193.60x = 14,508,652,903.78
  5. Step 5: Solve for x
    x = 14,508,652,903.78/139,193.60
  6. Step 6: Final answer
    x = 104,233.62

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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.