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Finding the Fourth Proportional to 65,492.80, 98,239.20 and 18,107.80

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Solution

The fourth proportional to 65,492.80, 98,239.20 and 18,107.80 is: 27,161.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,492.80 : 98,239.20 = 18,107.80 : x
  2. Step 2: Convert to fraction form
    65,492.80/98,239.20 = 18,107.80/x
  3. Step 3: Cross multiply
    65,492.80x = 98,239.20 × 18,107.80
  4. Step 4: Simplify right side
    65,492.80x = 1,778,895,785.76
  5. Step 5: Solve for x
    x = 1,778,895,785.76/65,492.80
  6. Step 6: Final answer
    x = 27,161.70

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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.