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Finding the Fourth Proportional to 70,665.95, 106,010.46 and 20,747.68

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Solution

The fourth proportional to 70,665.95, 106,010.46 and 20,747.68 is: 31,124.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,665.95 : 106,010.46 = 20,747.68 : x
  2. Step 2: Convert to fraction form
    70,665.95/106,010.46 = 20,747.68/x
  3. Step 3: Cross multiply
    70,665.95x = 106,010.46 × 20,747.68
  4. Step 4: Simplify right side
    70,665.95x = 2,199,470,835.71
  5. Step 5: Solve for x
    x = 2,199,470,835.71/70,665.95
  6. Step 6: Final answer
    x = 31,124.90

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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.