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Finding the Fourth Proportional to 81,330.60, 121,823.10 and 67,506.60

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Solution

The fourth proportional to 81,330.60, 121,823.10 and 67,506.60 is: 101,116.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,330.60 : 121,823.10 = 67,506.60 : x
  2. Step 2: Convert to fraction form
    81,330.60/121,823.10 = 67,506.60/x
  3. Step 3: Cross multiply
    81,330.60x = 121,823.10 × 67,506.60
  4. Step 4: Simplify right side
    81,330.60x = 8,223,863,282.46
  5. Step 5: Solve for x
    x = 8,223,863,282.46/81,330.60
  6. Step 6: Final answer
    x = 101,116.47

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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.