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Finding the Fourth Proportional to 65,240.64, 90,065.52 and 40,104.72

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Solution

The fourth proportional to 65,240.64, 90,065.52 and 40,104.72 is: 55,365.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,240.64 : 90,065.52 = 40,104.72 : x
  2. Step 2: Convert to fraction form
    65,240.64/90,065.52 = 40,104.72/x
  3. Step 3: Cross multiply
    65,240.64x = 90,065.52 × 40,104.72
  4. Step 4: Simplify right side
    65,240.64x = 3,612,052,461.25
  5. Step 5: Solve for x
    x = 3,612,052,461.25/65,240.64
  6. Step 6: Final answer
    x = 55,365.07

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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.