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Finding the Fourth Proportional to 62,630, 86,474.76 and 40,312.88

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Solution

The fourth proportional to 62,630, 86,474.76 and 40,312.88 is: 55,660.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    62,630 : 86,474.76 = 40,312.88 : x
  2. Step 2: Convert to fraction form
    62,630/86,474.76 = 40,312.88/x
  3. Step 3: Cross multiply
    62,630x = 86,474.76 × 40,312.88
  4. Step 4: Simplify right side
    62,630x = 3,486,046,622.91
  5. Step 5: Solve for x
    x = 3,486,046,622.91/62,630
  6. Step 6: Final answer
    x = 55,660.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.