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Finding the Fourth Proportional to 65,828, 90,760.29 and 54,941.87

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Solution

The fourth proportional to 65,828, 90,760.29 and 54,941.87 is: 75,751.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,828 : 90,760.29 = 54,941.87 : x
  2. Step 2: Convert to fraction form
    65,828/90,760.29 = 54,941.87/x
  3. Step 3: Cross multiply
    65,828x = 90,760.29 × 54,941.87
  4. Step 4: Simplify right side
    65,828x = 4,986,540,054.34
  5. Step 5: Solve for x
    x = 4,986,540,054.34/65,828
  6. Step 6: Final answer
    x = 75,751.05

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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.