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Finding the Fourth Proportional to 65,579.99, 90,469.65 and 38,704.19

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Solution

The fourth proportional to 65,579.99, 90,469.65 and 38,704.19 is: 53,393.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,579.99 : 90,469.65 = 38,704.19 : x
  2. Step 2: Convert to fraction form
    65,579.99/90,469.65 = 38,704.19/x
  3. Step 3: Cross multiply
    65,579.99x = 90,469.65 × 38,704.19
  4. Step 4: Simplify right side
    65,579.99x = 3,501,554,070.49
  5. Step 5: Solve for x
    x = 3,501,554,070.49/65,579.99
  6. Step 6: Final answer
    x = 53,393.64

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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.