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Finding the Fourth Proportional to 88,972.80, 122,630.40 and 67,718.40

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Solution

The fourth proportional to 88,972.80, 122,630.40 and 67,718.40 is: 93,335.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,972.80 : 122,630.40 = 67,718.40 : x
  2. Step 2: Convert to fraction form
    88,972.80/122,630.40 = 67,718.40/x
  3. Step 3: Cross multiply
    88,972.80x = 122,630.40 × 67,718.40
  4. Step 4: Simplify right side
    88,972.80x = 8,304,334,479.36
  5. Step 5: Solve for x
    x = 8,304,334,479.36/88,972.80
  6. Step 6: Final answer
    x = 93,335.65

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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.