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Finding the Fourth Proportional to 70,929.68, 106,398.17 and 18,339.62

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Solution

The fourth proportional to 70,929.68, 106,398.17 and 18,339.62 is: 27,510.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,929.68 : 106,398.17 = 18,339.62 : x
  2. Step 2: Convert to fraction form
    70,929.68/106,398.17 = 18,339.62/x
  3. Step 3: Cross multiply
    70,929.68x = 106,398.17 × 18,339.62
  4. Step 4: Simplify right side
    70,929.68x = 1,951,302,006.50
  5. Step 5: Solve for x
    x = 1,951,302,006.50/70,929.68
  6. Step 6: Final answer
    x = 27,510.37

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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.