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Finding the Fourth Proportional to 67,754.51, 101,630.84 and 21,007.38

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Solution

The fourth proportional to 67,754.51, 101,630.84 and 21,007.38 is: 31,510.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,754.51 : 101,630.84 = 21,007.38 : x
  2. Step 2: Convert to fraction form
    67,754.51/101,630.84 = 21,007.38/x
  3. Step 3: Cross multiply
    67,754.51x = 101,630.84 × 21,007.38
  4. Step 4: Simplify right side
    67,754.51x = 2,134,997,570.56
  5. Step 5: Solve for x
    x = 2,134,997,570.56/67,754.51
  6. Step 6: Final answer
    x = 31,510.78

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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.