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Finding the Fourth Proportional to 64,787.40, 89,408.46 and 36,495.72

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Solution

The fourth proportional to 64,787.40, 89,408.46 and 36,495.72 is: 50,365.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,787.40 : 89,408.46 = 36,495.72 : x
  2. Step 2: Convert to fraction form
    64,787.40/89,408.46 = 36,495.72/x
  3. Step 3: Cross multiply
    64,787.40x = 89,408.46 × 36,495.72
  4. Step 4: Simplify right side
    64,787.40x = 3,263,026,121.79
  5. Step 5: Solve for x
    x = 3,263,026,121.79/64,787.40
  6. Step 6: Final answer
    x = 50,365.13

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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.