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Finding the Fourth Proportional to 65,070.87, 89,797.17 and 36,390.21

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Solution

The fourth proportional to 65,070.87, 89,797.17 and 36,390.21 is: 50,218.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,070.87 : 89,797.17 = 36,390.21 : x
  2. Step 2: Convert to fraction form
    65,070.87/89,797.17 = 36,390.21/x
  3. Step 3: Cross multiply
    65,070.87x = 89,797.17 × 36,390.21
  4. Step 4: Simplify right side
    65,070.87x = 3,267,737,873.71
  5. Step 5: Solve for x
    x = 3,267,737,873.71/65,070.87
  6. Step 6: Final answer
    x = 50,218.14

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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.