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Finding the Fourth Proportional to 65,662.48, 98,479.32 and 18,905.20

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Solution

The fourth proportional to 65,662.48, 98,479.32 and 18,905.20 is: 28,353.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,662.48 : 98,479.32 = 18,905.20 : x
  2. Step 2: Convert to fraction form
    65,662.48/98,479.32 = 18,905.20/x
  3. Step 3: Cross multiply
    65,662.48x = 98,479.32 × 18,905.20
  4. Step 4: Simplify right side
    65,662.48x = 1,861,771,240.46
  5. Step 5: Solve for x
    x = 1,861,771,240.46/65,662.48
  6. Step 6: Final answer
    x = 28,353.65

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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.