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Finding the Fourth Proportional to 121,449.40, 182,562.90 and 86,630.20

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Solution

The fourth proportional to 121,449.40, 182,562.90 and 86,630.20 is: 130,222.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,449.40 : 182,562.90 = 86,630.20 : x
  2. Step 2: Convert to fraction form
    121,449.40/182,562.90 = 86,630.20/x
  3. Step 3: Cross multiply
    121,449.40x = 182,562.90 × 86,630.20
  4. Step 4: Simplify right side
    121,449.40x = 15,815,460,539.58
  5. Step 5: Solve for x
    x = 15,815,460,539.58/121,449.40
  6. Step 6: Final answer
    x = 130,222.63

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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.