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Finding the Fourth Proportional to 65,883.54, 90,909.47 and 40,028.65

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Solution

The fourth proportional to 65,883.54, 90,909.47 and 40,028.65 is: 55,233.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,883.54 : 90,909.47 = 40,028.65 : x
  2. Step 2: Convert to fraction form
    65,883.54/90,909.47 = 40,028.65/x
  3. Step 3: Cross multiply
    65,883.54x = 90,909.47 × 40,028.65
  4. Step 4: Simplify right side
    65,883.54x = 3,638,983,229.11
  5. Step 5: Solve for x
    x = 3,638,983,229.11/65,883.54
  6. Step 6: Final answer
    x = 55,233.57

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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.