Home / 142,115.72-196,120.32-78,454.04

Finding the Fourth Proportional to 142,115.72, 196,120.32 and 78,454.04

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Solution

The fourth proportional to 142,115.72, 196,120.32 and 78,454.04 is: 108,266.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,115.72 : 196,120.32 = 78,454.04 : x
  2. Step 2: Convert to fraction form
    142,115.72/196,120.32 = 78,454.04/x
  3. Step 3: Cross multiply
    142,115.72x = 196,120.32 × 78,454.04
  4. Step 4: Simplify right side
    142,115.72x = 15,386,431,430.09
  5. Step 5: Solve for x
    x = 15,386,431,430.09/142,115.72
  6. Step 6: Final answer
    x = 108,266.92

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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.