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Finding the Fourth Proportional to 108,812.70, 163,219.05 and 71,487.90

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Solution

The fourth proportional to 108,812.70, 163,219.05 and 71,487.90 is: 107,231.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,812.70 : 163,219.05 = 71,487.90 : x
  2. Step 2: Convert to fraction form
    108,812.70/163,219.05 = 71,487.90/x
  3. Step 3: Cross multiply
    108,812.70x = 163,219.05 × 71,487.90
  4. Step 4: Simplify right side
    108,812.70x = 11,668,187,124.50
  5. Step 5: Solve for x
    x = 11,668,187,124.50/108,812.70
  6. Step 6: Final answer
    x = 107,231.85

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1.5x scale

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.