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Finding the Fourth Proportional to 171,490.82, 256,775.43 and 139,770.86

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Solution

The fourth proportional to 171,490.82, 256,775.43 and 139,770.86 is: 209,280.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,490.82 : 256,775.43 = 139,770.86 : x
  2. Step 2: Convert to fraction form
    171,490.82/256,775.43 = 139,770.86/x
  3. Step 3: Cross multiply
    171,490.82x = 256,775.43 × 139,770.86
  4. Step 4: Simplify right side
    171,490.82x = 35,889,722,677.97
  5. Step 5: Solve for x
    x = 35,889,722,677.97/171,490.82
  6. Step 6: Final answer
    x = 209,280.72

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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.