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Finding the Fourth Proportional to 64,688.48, 89,269.72 and 36,394.32

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Solution

The fourth proportional to 64,688.48, 89,269.72 and 36,394.32 is: 50,223.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,688.48 : 89,269.72 = 36,394.32 : x
  2. Step 2: Convert to fraction form
    64,688.48/89,269.72 = 36,394.32/x
  3. Step 3: Cross multiply
    64,688.48x = 89,269.72 × 36,394.32
  4. Step 4: Simplify right side
    64,688.48x = 3,248,910,755.99
  5. Step 5: Solve for x
    x = 3,248,910,755.99/64,688.48
  6. Step 6: Final answer
    x = 50,223.95

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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.