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Finding the Fourth Proportional to 171,878.60, 257,817.90 and 115,891.40

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Solution

The fourth proportional to 171,878.60, 257,817.90 and 115,891.40 is: 173,837.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,878.60 : 257,817.90 = 115,891.40 : x
  2. Step 2: Convert to fraction form
    171,878.60/257,817.90 = 115,891.40/x
  3. Step 3: Cross multiply
    171,878.60x = 257,817.90 × 115,891.40
  4. Step 4: Simplify right side
    171,878.60x = 29,878,877,376.06
  5. Step 5: Solve for x
    x = 29,878,877,376.06/171,878.60
  6. Step 6: Final answer
    x = 173,837.10

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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.