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Finding the Fourth Proportional to 70,693.80, 106,032.72 and 18,103.68

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Solution

The fourth proportional to 70,693.80, 106,032.72 and 18,103.68 is: 27,153.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,693.80 : 106,032.72 = 18,103.68 : x
  2. Step 2: Convert to fraction form
    70,693.80/106,032.72 = 18,103.68/x
  3. Step 3: Cross multiply
    70,693.80x = 106,032.72 × 18,103.68
  4. Step 4: Simplify right side
    70,693.80x = 1,919,582,432.41
  5. Step 5: Solve for x
    x = 1,919,582,432.41/70,693.80
  6. Step 6: Final answer
    x = 27,153.48

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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.