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Finding the Fourth Proportional to 65,689.21, 89,994.55 and 63,229.19

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Solution

The fourth proportional to 65,689.21, 89,994.55 and 63,229.19 is: 86,624.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,689.21 : 89,994.55 = 63,229.19 : x
  2. Step 2: Convert to fraction form
    65,689.21/89,994.55 = 63,229.19/x
  3. Step 3: Cross multiply
    65,689.21x = 89,994.55 × 63,229.19
  4. Step 4: Simplify right side
    65,689.21x = 5,690,282,184.77
  5. Step 5: Solve for x
    x = 5,690,282,184.77/65,689.21
  6. Step 6: Final answer
    x = 86,624.31

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.