Home / 142,649.12-196,853.39-78,985.55

Finding the Fourth Proportional to 142,649.12, 196,853.39 and 78,985.55

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Solution

The fourth proportional to 142,649.12, 196,853.39 and 78,985.55 is: 108,998.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,649.12 : 196,853.39 = 78,985.55 : x
  2. Step 2: Convert to fraction form
    142,649.12/196,853.39 = 78,985.55/x
  3. Step 3: Cross multiply
    142,649.12x = 196,853.39 × 78,985.55
  4. Step 4: Simplify right side
    142,649.12x = 15,548,573,375.72
  5. Step 5: Solve for x
    x = 15,548,573,375.72/142,649.12
  6. Step 6: Final answer
    x = 108,998.73

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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.