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Finding the Fourth Proportional to 119,671.80, 165,142.68 and 71,929.62

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Solution

The fourth proportional to 119,671.80, 165,142.68 and 71,929.62 is: 99,260.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,671.80 : 165,142.68 = 71,929.62 : x
  2. Step 2: Convert to fraction form
    119,671.80/165,142.68 = 71,929.62/x
  3. Step 3: Cross multiply
    119,671.80x = 165,142.68 × 71,929.62
  4. Step 4: Simplify right side
    119,671.80x = 11,878,650,218.18
  5. Step 5: Solve for x
    x = 11,878,650,218.18/119,671.80
  6. Step 6: Final answer
    x = 99,260.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.