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Finding the Fourth Proportional to 70,990.12, 106,525.88 and 28,862.42

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Solution

The fourth proportional to 70,990.12, 106,525.88 and 28,862.42 is: 43,310.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,990.12 : 106,525.88 = 28,862.42 : x
  2. Step 2: Convert to fraction form
    70,990.12/106,525.88 = 28,862.42/x
  3. Step 3: Cross multiply
    70,990.12x = 106,525.88 × 28,862.42
  4. Step 4: Simplify right side
    70,990.12x = 3,074,594,545.12
  5. Step 5: Solve for x
    x = 3,074,594,545.12/70,990.12
  6. Step 6: Final answer
    x = 43,310.18

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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.