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Finding the Fourth Proportional to 64,689.36, 89,272.72 and 36,010.50

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Solution

The fourth proportional to 64,689.36, 89,272.72 and 36,010.50 is: 49,695.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,689.36 : 89,272.72 = 36,010.50 : x
  2. Step 2: Convert to fraction form
    64,689.36/89,272.72 = 36,010.50/x
  3. Step 3: Cross multiply
    64,689.36x = 89,272.72 × 36,010.50
  4. Step 4: Simplify right side
    64,689.36x = 3,214,755,283.56
  5. Step 5: Solve for x
    x = 3,214,755,283.56/64,689.36
  6. Step 6: Final answer
    x = 49,695.27

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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.