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Finding the Fourth Proportional to 65,128.76, 89,882.51 and 36,451.29

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Solution

The fourth proportional to 65,128.76, 89,882.51 and 36,451.29 is: 50,305.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,128.76 : 89,882.51 = 36,451.29 : x
  2. Step 2: Convert to fraction form
    65,128.76/89,882.51 = 36,451.29/x
  3. Step 3: Cross multiply
    65,128.76x = 89,882.51 × 36,451.29
  4. Step 4: Simplify right side
    65,128.76x = 3,276,333,437.94
  5. Step 5: Solve for x
    x = 3,276,333,437.94/65,128.76
  6. Step 6: Final answer
    x = 50,305.48

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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.