Home / 142,107.86-196,110.45-78,445.70

Finding the Fourth Proportional to 142,107.86, 196,110.45 and 78,445.70

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Solution

The fourth proportional to 142,107.86, 196,110.45 and 78,445.70 is: 108,255.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,107.86 : 196,110.45 = 78,445.70 : x
  2. Step 2: Convert to fraction form
    142,107.86/196,110.45 = 78,445.70/x
  3. Step 3: Cross multiply
    142,107.86x = 196,110.45 × 78,445.70
  4. Step 4: Simplify right side
    142,107.86x = 15,384,021,527.57
  5. Step 5: Solve for x
    x = 15,384,021,527.57/142,107.86
  6. Step 6: Final answer
    x = 108,255.95

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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.