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Finding the Fourth Proportional to 207,638.70, 310,801.95 and 163,023.90

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Solution

The fourth proportional to 207,638.70, 310,801.95 and 163,023.90 is: 244,020.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,638.70 : 310,801.95 = 163,023.90 : x
  2. Step 2: Convert to fraction form
    207,638.70/310,801.95 = 163,023.90/x
  3. Step 3: Cross multiply
    207,638.70x = 310,801.95 × 163,023.90
  4. Step 4: Simplify right side
    207,638.70x = 50,668,146,016.61
  5. Step 5: Solve for x
    x = 50,668,146,016.61/207,638.70
  6. Step 6: Final answer
    x = 244,020.72

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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.