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Finding the Fourth Proportional to 60,680.70, 91,061.54 and 21,237.82

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Solution

The fourth proportional to 60,680.70, 91,061.54 and 21,237.82 is: 31,870.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,680.70 : 91,061.54 = 21,237.82 : x
  2. Step 2: Convert to fraction form
    60,680.70/91,061.54 = 21,237.82/x
  3. Step 3: Cross multiply
    60,680.70x = 91,061.54 × 21,237.82
  4. Step 4: Simplify right side
    60,680.70x = 1,933,948,420.88
  5. Step 5: Solve for x
    x = 1,933,948,420.88/60,680.70
  6. Step 6: Final answer
    x = 31,870.90

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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.