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Finding the Fourth Proportional to 65,855.48, 90,880.56 and 35,640.80

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Solution

The fourth proportional to 65,855.48, 90,880.56 and 35,640.80 is: 49,184.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,855.48 : 90,880.56 = 35,640.80 : x
  2. Step 2: Convert to fraction form
    65,855.48/90,880.56 = 35,640.80/x
  3. Step 3: Cross multiply
    65,855.48x = 90,880.56 × 35,640.80
  4. Step 4: Simplify right side
    65,855.48x = 3,239,055,862.85
  5. Step 5: Solve for x
    x = 3,239,055,862.85/65,855.48
  6. Step 6: Final answer
    x = 49,184.30

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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.