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Finding the Fourth Proportional to 171,861.20, 257,804.08 and 71,920.76

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Solution

The fourth proportional to 171,861.20, 257,804.08 and 71,920.76 is: 107,886.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,861.20 : 257,804.08 = 71,920.76 : x
  2. Step 2: Convert to fraction form
    171,861.20/257,804.08 = 71,920.76/x
  3. Step 3: Cross multiply
    171,861.20x = 257,804.08 × 71,920.76
  4. Step 4: Simplify right side
    171,861.20x = 18,541,465,364.70
  5. Step 5: Solve for x
    x = 18,541,465,364.70/171,861.20
  6. Step 6: Final answer
    x = 107,886.28

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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.