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Finding the Fourth Proportional to 70,929.80, 106,398.36 and 18,339.74

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Solution

The fourth proportional to 70,929.80, 106,398.36 and 18,339.74 is: 27,510.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,929.80 : 106,398.36 = 18,339.74 : x
  2. Step 2: Convert to fraction form
    70,929.80/106,398.36 = 18,339.74/x
  3. Step 3: Cross multiply
    70,929.80x = 106,398.36 × 18,339.74
  4. Step 4: Simplify right side
    70,929.80x = 1,951,318,258.83
  5. Step 5: Solve for x
    x = 1,951,318,258.83/70,929.80
  6. Step 6: Final answer
    x = 27,510.56

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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.