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Finding the Fourth Proportional to 74,511, 111,772.98 and 19,107

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Solution

The fourth proportional to 74,511, 111,772.98 and 19,107 is: 28,662.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,511 : 111,772.98 = 19,107 : x
  2. Step 2: Convert to fraction form
    74,511/111,772.98 = 19,107/x
  3. Step 3: Cross multiply
    74,511x = 111,772.98 × 19,107
  4. Step 4: Simplify right side
    74,511x = 2,135,646,328.86
  5. Step 5: Solve for x
    x = 2,135,646,328.86/74,511
  6. Step 6: Final answer
    x = 28,662.16

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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.