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Finding the Fourth Proportional to 171,278.95, 257,012.45 and 87,046.38

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Solution

The fourth proportional to 171,278.95, 257,012.45 and 87,046.38 is: 130,617.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,278.95 : 257,012.45 = 87,046.38 : x
  2. Step 2: Convert to fraction form
    171,278.95/257,012.45 = 87,046.38/x
  3. Step 3: Cross multiply
    171,278.95x = 257,012.45 × 87,046.38
  4. Step 4: Simplify right side
    171,278.95x = 22,372,003,387.43
  5. Step 5: Solve for x
    x = 22,372,003,387.43/171,278.95
  6. Step 6: Final answer
    x = 130,617.35

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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.