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Finding the Fourth Proportional to 171,005.80, 256,508.70 and 71,132.80

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Solution

The fourth proportional to 171,005.80, 256,508.70 and 71,132.80 is: 106,699.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,005.80 : 256,508.70 = 71,132.80 : x
  2. Step 2: Convert to fraction form
    171,005.80/256,508.70 = 71,132.80/x
  3. Step 3: Cross multiply
    171,005.80x = 256,508.70 × 71,132.80
  4. Step 4: Simplify right side
    171,005.80x = 18,246,182,055.36
  5. Step 5: Solve for x
    x = 18,246,182,055.36/171,005.80
  6. Step 6: Final answer
    x = 106,699.20

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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.