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Finding the Fourth Proportional to 70,688.61, 106,050.78 and 20,770.29

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Solution

The fourth proportional to 70,688.61, 106,050.78 and 20,770.29 is: 31,160.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,688.61 : 106,050.78 = 20,770.29 : x
  2. Step 2: Convert to fraction form
    70,688.61/106,050.78 = 20,770.29/x
  3. Step 3: Cross multiply
    70,688.61x = 106,050.78 × 20,770.29
  4. Step 4: Simplify right side
    70,688.61x = 2,202,705,455.33
  5. Step 5: Solve for x
    x = 2,202,705,455.33/70,688.61
  6. Step 6: Final answer
    x = 31,160.68

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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.