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Finding the Fourth Proportional to 65,638.82, 90,704.19 and 53,697.80

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Solution

The fourth proportional to 65,638.82, 90,704.19 and 53,697.80 is: 74,203.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,638.82 : 90,704.19 = 53,697.80 : x
  2. Step 2: Convert to fraction form
    65,638.82/90,704.19 = 53,697.80/x
  3. Step 3: Cross multiply
    65,638.82x = 90,704.19 × 53,697.80
  4. Step 4: Simplify right side
    65,638.82x = 4,870,615,000.26
  5. Step 5: Solve for x
    x = 4,870,615,000.26/65,638.82
  6. Step 6: Final answer
    x = 74,203.27

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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.