Home / 65,721.78-98,557.08-21,337.80

Finding the Fourth Proportional to 65,721.78, 98,557.08 and 21,337.80

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Solution

The fourth proportional to 65,721.78, 98,557.08 and 21,337.80 is: 31,998.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,721.78 : 98,557.08 = 21,337.80 : x
  2. Step 2: Convert to fraction form
    65,721.78/98,557.08 = 21,337.80/x
  3. Step 3: Cross multiply
    65,721.78x = 98,557.08 × 21,337.80
  4. Step 4: Simplify right side
    65,721.78x = 2,102,991,261.62
  5. Step 5: Solve for x
    x = 2,102,991,261.62/65,721.78
  6. Step 6: Final answer
    x = 31,998.39

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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.