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Finding the Fourth Proportional to 60,978.80, 91,496.96 and 21,554.48

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Solution

The fourth proportional to 60,978.80, 91,496.96 and 21,554.48 is: 32,341.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,978.80 : 91,496.96 = 21,554.48 : x
  2. Step 2: Convert to fraction form
    60,978.80/91,496.96 = 21,554.48/x
  3. Step 3: Cross multiply
    60,978.80x = 91,496.96 × 21,554.48
  4. Step 4: Simplify right side
    60,978.80x = 1,972,169,394.38
  5. Step 5: Solve for x
    x = 1,972,169,394.38/60,978.80
  6. Step 6: Final answer
    x = 32,341.89

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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.