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Finding the Fourth Proportional to 56,870, 85,305 and 15,317

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Solution

The fourth proportional to 56,870, 85,305 and 15,317 is: 22,975.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,870 : 85,305 = 15,317 : x
  2. Step 2: Convert to fraction form
    56,870/85,305 = 15,317/x
  3. Step 3: Cross multiply
    56,870x = 85,305 × 15,317
  4. Step 4: Simplify right side
    56,870x = 1,306,616,685
  5. Step 5: Solve for x
    x = 1,306,616,685/56,870
  6. Step 6: Final answer
    x = 22,975.50

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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.