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Finding the Fourth Proportional to 69,075.18, 103,612.70 and 21,693.96

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Solution

The fourth proportional to 69,075.18, 103,612.70 and 21,693.96 is: 32,540.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,075.18 : 103,612.70 = 21,693.96 : x
  2. Step 2: Convert to fraction form
    69,075.18/103,612.70 = 21,693.96/x
  3. Step 3: Cross multiply
    69,075.18x = 103,612.70 × 21,693.96
  4. Step 4: Simplify right side
    69,075.18x = 2,247,769,823.53
  5. Step 5: Solve for x
    x = 2,247,769,823.53/69,075.18
  6. Step 6: Final answer
    x = 32,540.92

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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.