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Finding the Fourth Proportional to 67,387.36, 101,063.68 and 19,991.28

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Solution

The fourth proportional to 67,387.36, 101,063.68 and 19,991.28 is: 29,981.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,387.36 : 101,063.68 = 19,991.28 : x
  2. Step 2: Convert to fraction form
    67,387.36/101,063.68 = 19,991.28/x
  3. Step 3: Cross multiply
    67,387.36x = 101,063.68 × 19,991.28
  4. Step 4: Simplify right side
    67,387.36x = 2,020,392,324.71
  5. Step 5: Solve for x
    x = 2,020,392,324.71/67,387.36
  6. Step 6: Final answer
    x = 29,981.77

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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.