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Finding the Fourth Proportional to 69,820.97, 104,731.66 and 19,220.66

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Solution

The fourth proportional to 69,820.97, 104,731.66 and 19,220.66 is: 28,831.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,820.97 : 104,731.66 = 19,220.66 : x
  2. Step 2: Convert to fraction form
    69,820.97/104,731.66 = 19,220.66/x
  3. Step 3: Cross multiply
    69,820.97x = 104,731.66 × 19,220.66
  4. Step 4: Simplify right side
    69,820.97x = 2,013,011,521.21
  5. Step 5: Solve for x
    x = 2,013,011,521.21/69,820.97
  6. Step 6: Final answer
    x = 28,831.04

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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.