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Finding the Fourth Proportional to 65,220.54, 90,018.36 and 39,735.18

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Solution

The fourth proportional to 65,220.54, 90,018.36 and 39,735.18 is: 54,843.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,220.54 : 90,018.36 = 39,735.18 : x
  2. Step 2: Convert to fraction form
    65,220.54/90,018.36 = 39,735.18/x
  3. Step 3: Cross multiply
    65,220.54x = 90,018.36 × 39,735.18
  4. Step 4: Simplify right side
    65,220.54x = 3,576,895,737.90
  5. Step 5: Solve for x
    x = 3,576,895,737.90/65,220.54
  6. Step 6: Final answer
    x = 54,843.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.