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Finding the Fourth Proportional to 142,763.58, 213,911.76 and 86,432.97

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Solution

The fourth proportional to 142,763.58, 213,911.76 and 86,432.97 is: 129,508.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,763.58 : 213,911.76 = 86,432.97 : x
  2. Step 2: Convert to fraction form
    142,763.58/213,911.76 = 86,432.97/x
  3. Step 3: Cross multiply
    142,763.58x = 213,911.76 × 86,432.97
  4. Step 4: Simplify right side
    142,763.58x = 18,489,028,734.73
  5. Step 5: Solve for x
    x = 18,489,028,734.73/142,763.58
  6. Step 6: Final answer
    x = 129,508.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.