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Finding the Fourth Proportional to 67,765.56, 101,643.45 and 21,017.22

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Solution

The fourth proportional to 67,765.56, 101,643.45 and 21,017.22 is: 31,524.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,765.56 : 101,643.45 = 21,017.22 : x
  2. Step 2: Convert to fraction form
    67,765.56/101,643.45 = 21,017.22/x
  3. Step 3: Cross multiply
    67,765.56x = 101,643.45 × 21,017.22
  4. Step 4: Simplify right side
    67,765.56x = 2,136,262,750.21
  5. Step 5: Solve for x
    x = 2,136,262,750.21/67,765.56
  6. Step 6: Final answer
    x = 31,524.31

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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.