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Finding the Fourth Proportional to 65,571.81, 90,486.42 and 38,722.95

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Solution

The fourth proportional to 65,571.81, 90,486.42 and 38,722.95 is: 53,436.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,571.81 : 90,486.42 = 38,722.95 : x
  2. Step 2: Convert to fraction form
    65,571.81/90,486.42 = 38,722.95/x
  3. Step 3: Cross multiply
    65,571.81x = 90,486.42 × 38,722.95
  4. Step 4: Simplify right side
    65,571.81x = 3,503,901,117.34
  5. Step 5: Solve for x
    x = 3,503,901,117.34/65,571.81
  6. Step 6: Final answer
    x = 53,436.09

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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.