Home / 142,083.78-196,077.24-78,421.62

Finding the Fourth Proportional to 142,083.78, 196,077.24 and 78,421.62

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Solution

The fourth proportional to 142,083.78, 196,077.24 and 78,421.62 is: 108,222.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,083.78 : 196,077.24 = 78,421.62 : x
  2. Step 2: Convert to fraction form
    142,083.78/196,077.24 = 78,421.62/x
  3. Step 3: Cross multiply
    142,083.78x = 196,077.24 × 78,421.62
  4. Step 4: Simplify right side
    142,083.78x = 15,376,694,805.93
  5. Step 5: Solve for x
    x = 15,376,694,805.93/142,083.78
  6. Step 6: Final answer
    x = 108,222.73

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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.