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Finding the Fourth Proportional to 68,721.80, 103,071.90 and 24,342.20

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Solution

The fourth proportional to 68,721.80, 103,071.90 and 24,342.20 is: 36,509.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,721.80 : 103,071.90 = 24,342.20 : x
  2. Step 2: Convert to fraction form
    68,721.80/103,071.90 = 24,342.20/x
  3. Step 3: Cross multiply
    68,721.80x = 103,071.90 × 24,342.20
  4. Step 4: Simplify right side
    68,721.80x = 2,508,996,804.18
  5. Step 5: Solve for x
    x = 2,508,996,804.18/68,721.80
  6. Step 6: Final answer
    x = 36,509.47

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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.