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Finding the Fourth Proportional to 65,668.23, 90,622.08 and 38,820.42

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Solution

The fourth proportional to 65,668.23, 90,622.08 and 38,820.42 is: 53,572.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,668.23 : 90,622.08 = 38,820.42 : x
  2. Step 2: Convert to fraction form
    65,668.23/90,622.08 = 38,820.42/x
  3. Step 3: Cross multiply
    65,668.23x = 90,622.08 × 38,820.42
  4. Step 4: Simplify right side
    65,668.23x = 3,517,987,206.87
  5. Step 5: Solve for x
    x = 3,517,987,206.87/65,668.23
  6. Step 6: Final answer
    x = 53,572.13

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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.