Home / 139,780.57-192,905.28-105,263.50

Finding the Fourth Proportional to 139,780.57, 192,905.28 and 105,263.50

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Solution

The fourth proportional to 139,780.57, 192,905.28 and 105,263.50 is: 145,269.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,780.57 : 192,905.28 = 105,263.50 : x
  2. Step 2: Convert to fraction form
    139,780.57/192,905.28 = 105,263.50/x
  3. Step 3: Cross multiply
    139,780.57x = 192,905.28 × 105,263.50
  4. Step 4: Simplify right side
    139,780.57x = 20,305,884,941.28
  5. Step 5: Solve for x
    x = 20,305,884,941.28/139,780.57
  6. Step 6: Final answer
    x = 145,269.73

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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.