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Finding the Fourth Proportional to 171,641.10, 257,126.48 and 81,555.61

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Solution

The fourth proportional to 171,641.10, 257,126.48 and 81,555.61 is: 122,174.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,641.10 : 257,126.48 = 81,555.61 : x
  2. Step 2: Convert to fraction form
    171,641.10/257,126.48 = 81,555.61/x
  3. Step 3: Cross multiply
    171,641.10x = 257,126.48 × 81,555.61
  4. Step 4: Simplify right side
    171,641.10x = 20,970,106,923.55
  5. Step 5: Solve for x
    x = 20,970,106,923.55/171,641.10
  6. Step 6: Final answer
    x = 122,174.16

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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.