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Finding the Fourth Proportional to 65,781.69, 90,778.71 and 35,567.01

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Solution

The fourth proportional to 65,781.69, 90,778.71 and 35,567.01 is: 49,082.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,781.69 : 90,778.71 = 35,567.01 : x
  2. Step 2: Convert to fraction form
    65,781.69/90,778.71 = 35,567.01/x
  3. Step 3: Cross multiply
    65,781.69x = 90,778.71 × 35,567.01
  4. Step 4: Simplify right side
    65,781.69x = 3,228,727,286.36
  5. Step 5: Solve for x
    x = 3,228,727,286.36/65,781.69
  6. Step 6: Final answer
    x = 49,082.46

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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.