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Finding the Fourth Proportional to 171,908.60, 257,862.90 and 115,921.40

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Solution

The fourth proportional to 171,908.60, 257,862.90 and 115,921.40 is: 173,882.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,908.60 : 257,862.90 = 115,921.40 : x
  2. Step 2: Convert to fraction form
    171,908.60/257,862.90 = 115,921.40/x
  3. Step 3: Cross multiply
    171,908.60x = 257,862.90 × 115,921.40
  4. Step 4: Simplify right side
    171,908.60x = 29,891,828,376.06
  5. Step 5: Solve for x
    x = 29,891,828,376.06/171,908.60
  6. Step 6: Final answer
    x = 173,882.10

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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.