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Finding the Fourth Proportional to 71,079.53, 106,656.35 and 28,990.71

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Solution

The fourth proportional to 71,079.53, 106,656.35 and 28,990.71 is: 43,501.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,079.53 : 106,656.35 = 28,990.71 : x
  2. Step 2: Convert to fraction form
    71,079.53/106,656.35 = 28,990.71/x
  3. Step 3: Cross multiply
    71,079.53x = 106,656.35 × 28,990.71
  4. Step 4: Simplify right side
    71,079.53x = 3,092,043,167.55
  5. Step 5: Solve for x
    x = 3,092,043,167.55/71,079.53
  6. Step 6: Final answer
    x = 43,501.18

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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.