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Finding the Fourth Proportional to 171,897.50, 257,911.86 and 66,724.68

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Solution

The fourth proportional to 171,897.50, 257,911.86 and 66,724.68 is: 100,112.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,897.50 : 257,911.86 = 66,724.68 : x
  2. Step 2: Convert to fraction form
    171,897.50/257,911.86 = 66,724.68/x
  3. Step 3: Cross multiply
    171,897.50x = 257,911.86 × 66,724.68
  4. Step 4: Simplify right side
    171,897.50x = 17,209,086,326.70
  5. Step 5: Solve for x
    x = 17,209,086,326.70/171,897.50
  6. Step 6: Final answer
    x = 100,112.49

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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.