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Finding the Fourth Proportional to 64,787.79, 89,408.63 and 36,110.40

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Solution

The fourth proportional to 64,787.79, 89,408.63 and 36,110.40 is: 49,833.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,787.79 : 89,408.63 = 36,110.40 : x
  2. Step 2: Convert to fraction form
    64,787.79/89,408.63 = 36,110.40/x
  3. Step 3: Cross multiply
    64,787.79x = 89,408.63 × 36,110.40
  4. Step 4: Simplify right side
    64,787.79x = 3,228,581,392.75
  5. Step 5: Solve for x
    x = 3,228,581,392.75/64,787.79
  6. Step 6: Final answer
    x = 49,833.18

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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.