Home / 81,431.10-122,103.45-28,842.30

Finding the Fourth Proportional to 81,431.10, 122,103.45 and 28,842.30

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Solution

The fourth proportional to 81,431.10, 122,103.45 and 28,842.30 is: 43,248.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,431.10 : 122,103.45 = 28,842.30 : x
  2. Step 2: Convert to fraction form
    81,431.10/122,103.45 = 28,842.30/x
  3. Step 3: Cross multiply
    81,431.10x = 122,103.45 × 28,842.30
  4. Step 4: Simplify right side
    81,431.10x = 3,521,744,335.94
  5. Step 5: Solve for x
    x = 3,521,744,335.94/81,431.10
  6. Step 6: Final answer
    x = 43,248.15

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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.