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Finding the Fourth Proportional to 42,809.88, 64,243.98 and 15,107.88

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Solution

The fourth proportional to 42,809.88, 64,243.98 and 15,107.88 is: 22,672.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,809.88 : 64,243.98 = 15,107.88 : x
  2. Step 2: Convert to fraction form
    42,809.88/64,243.98 = 15,107.88/x
  3. Step 3: Cross multiply
    42,809.88x = 64,243.98 × 15,107.88
  4. Step 4: Simplify right side
    42,809.88x = 970,590,340.56
  5. Step 5: Solve for x
    x = 970,590,340.56/42,809.88
  6. Step 6: Final answer
    x = 22,672.11

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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.