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Finding the Fourth Proportional to 60,616.81, 90,966.82 and 21,174

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Solution

The fourth proportional to 60,616.81, 90,966.82 and 21,174 is: 31,775.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,616.81 : 90,966.82 = 21,174 : x
  2. Step 2: Convert to fraction form
    60,616.81/90,966.82 = 21,174/x
  3. Step 3: Cross multiply
    60,616.81x = 90,966.82 × 21,174
  4. Step 4: Simplify right side
    60,616.81x = 1,926,131,446.68
  5. Step 5: Solve for x
    x = 1,926,131,446.68/60,616.81
  6. Step 6: Final answer
    x = 31,775.53

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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.