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Finding the Fourth Proportional to 67,680.98, 101,531.20 and 20,937.50

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Solution

The fourth proportional to 67,680.98, 101,531.20 and 20,937.50 is: 31,409.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,680.98 : 101,531.20 = 20,937.50 : x
  2. Step 2: Convert to fraction form
    67,680.98/101,531.20 = 20,937.50/x
  3. Step 3: Cross multiply
    67,680.98x = 101,531.20 × 20,937.50
  4. Step 4: Simplify right side
    67,680.98x = 2,125,809,500
  5. Step 5: Solve for x
    x = 2,125,809,500/67,680.98
  6. Step 6: Final answer
    x = 31,409.26

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1.5x scale

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.