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Finding the Fourth Proportional to 65,739.52, 90,720.52 and 35,931.52

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Solution

The fourth proportional to 65,739.52, 90,720.52 and 35,931.52 is: 49,585.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,739.52 : 90,720.52 = 35,931.52 : x
  2. Step 2: Convert to fraction form
    65,739.52/90,720.52 = 35,931.52/x
  3. Step 3: Cross multiply
    65,739.52x = 90,720.52 × 35,931.52
  4. Step 4: Simplify right side
    65,739.52x = 3,259,726,178.79
  5. Step 5: Solve for x
    x = 3,259,726,178.79/65,739.52
  6. Step 6: Final answer
    x = 49,585.49

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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.