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Finding the Fourth Proportional to 65,089.20, 97,639.20 and 20,714.70

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Solution

The fourth proportional to 65,089.20, 97,639.20 and 20,714.70 is: 31,073.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,089.20 : 97,639.20 = 20,714.70 : x
  2. Step 2: Convert to fraction form
    65,089.20/97,639.20 = 20,714.70/x
  3. Step 3: Cross multiply
    65,089.20x = 97,639.20 × 20,714.70
  4. Step 4: Simplify right side
    65,089.20x = 2,022,566,736.24
  5. Step 5: Solve for x
    x = 2,022,566,736.24/65,089.20
  6. Step 6: Final answer
    x = 31,073.77

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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.