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Finding the Fourth Proportional to 156,638.43, 216,109.58 and 88,648.65

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Solution

The fourth proportional to 156,638.43, 216,109.58 and 88,648.65 is: 122,306.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,638.43 : 216,109.58 = 88,648.65 : x
  2. Step 2: Convert to fraction form
    156,638.43/216,109.58 = 88,648.65/x
  3. Step 3: Cross multiply
    156,638.43x = 216,109.58 × 88,648.65
  4. Step 4: Simplify right side
    156,638.43x = 19,157,822,519.07
  5. Step 5: Solve for x
    x = 19,157,822,519.07/156,638.43
  6. Step 6: Final answer
    x = 122,306.02

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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.