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Finding the Fourth Proportional to 138,315.60, 207,667.80 and 108,766.80

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Solution

The fourth proportional to 138,315.60, 207,667.80 and 108,766.80 is: 163,303.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,315.60 : 207,667.80 = 108,766.80 : x
  2. Step 2: Convert to fraction form
    138,315.60/207,667.80 = 108,766.80/x
  3. Step 3: Cross multiply
    138,315.60x = 207,667.80 × 108,766.80
  4. Step 4: Simplify right side
    138,315.60x = 22,587,362,069.04
  5. Step 5: Solve for x
    x = 22,587,362,069.04/138,315.60
  6. Step 6: Final answer
    x = 163,303.07

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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.