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Finding the Fourth Proportional to 67,786.74, 101,696.58 and 21,040.02

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Solution

The fourth proportional to 67,786.74, 101,696.58 and 21,040.02 is: 31,565.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,786.74 : 101,696.58 = 21,040.02 : x
  2. Step 2: Convert to fraction form
    67,786.74/101,696.58 = 21,040.02/x
  3. Step 3: Cross multiply
    67,786.74x = 101,696.58 × 21,040.02
  4. Step 4: Simplify right side
    67,786.74x = 2,139,698,077.13
  5. Step 5: Solve for x
    x = 2,139,698,077.13/67,786.74
  6. Step 6: Final answer
    x = 31,565.14

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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.