Home / 142,111.78-196,114.52-78,449.65

Finding the Fourth Proportional to 142,111.78, 196,114.52 and 78,449.65

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Solution

The fourth proportional to 142,111.78, 196,114.52 and 78,449.65 is: 108,260.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,111.78 : 196,114.52 = 78,449.65 : x
  2. Step 2: Convert to fraction form
    142,111.78/196,114.52 = 78,449.65/x
  3. Step 3: Cross multiply
    142,111.78x = 196,114.52 × 78,449.65
  4. Step 4: Simplify right side
    142,111.78x = 15,385,115,453.92
  5. Step 5: Solve for x
    x = 15,385,115,453.92/142,111.78
  6. Step 6: Final answer
    x = 108,260.66

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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.