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Finding the Fourth Proportional to 74,775, 112,168.98 and 19,371

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Solution

The fourth proportional to 74,775, 112,168.98 and 19,371 is: 29,058.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,775 : 112,168.98 = 19,371 : x
  2. Step 2: Convert to fraction form
    74,775/112,168.98 = 19,371/x
  3. Step 3: Cross multiply
    74,775x = 112,168.98 × 19,371
  4. Step 4: Simplify right side
    74,775x = 2,172,825,311.58
  5. Step 5: Solve for x
    x = 2,172,825,311.58/74,775
  6. Step 6: Final answer
    x = 29,058.18

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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.