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Finding the Fourth Proportional to 67,972.50, 101,980.42 and 28,519.02

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Solution

The fourth proportional to 67,972.50, 101,980.42 and 28,519.02 is: 42,787.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,972.50 : 101,980.42 = 28,519.02 : x
  2. Step 2: Convert to fraction form
    67,972.50/101,980.42 = 28,519.02/x
  3. Step 3: Cross multiply
    67,972.50x = 101,980.42 × 28,519.02
  4. Step 4: Simplify right side
    67,972.50x = 2,908,381,566.29
  5. Step 5: Solve for x
    x = 2,908,381,566.29/67,972.50
  6. Step 6: Final answer
    x = 42,787.62

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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.