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Finding the Fourth Proportional to 65,505.79, 98,258.37 and 18,758.71

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Solution

The fourth proportional to 65,505.79, 98,258.37 and 18,758.71 is: 28,137.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,505.79 : 98,258.37 = 18,758.71 : x
  2. Step 2: Convert to fraction form
    65,505.79/98,258.37 = 18,758.71/x
  3. Step 3: Cross multiply
    65,505.79x = 98,258.37 × 18,758.71
  4. Step 4: Simplify right side
    65,505.79x = 1,843,200,267.90
  5. Step 5: Solve for x
    x = 1,843,200,267.90/65,505.79
  6. Step 6: Final answer
    x = 28,137.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.