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Finding the Fourth Proportional to 142,876.80, 197,175.60 and 79,221.60

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Solution

The fourth proportional to 142,876.80, 197,175.60 and 79,221.60 is: 109,328.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,876.80 : 197,175.60 = 79,221.60 : x
  2. Step 2: Convert to fraction form
    142,876.80/197,175.60 = 79,221.60/x
  3. Step 3: Cross multiply
    142,876.80x = 197,175.60 × 79,221.60
  4. Step 4: Simplify right side
    142,876.80x = 15,620,566,512.96
  5. Step 5: Solve for x
    x = 15,620,566,512.96/142,876.80
  6. Step 6: Final answer
    x = 109,328.92

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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.