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Finding the Fourth Proportional to 65,881.09, 90,914.81 and 35,666.17

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Solution

The fourth proportional to 65,881.09, 90,914.81 and 35,666.17 is: 49,218.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,881.09 : 90,914.81 = 35,666.17 : x
  2. Step 2: Convert to fraction form
    65,881.09/90,914.81 = 35,666.17/x
  3. Step 3: Cross multiply
    65,881.09x = 90,914.81 × 35,666.17
  4. Step 4: Simplify right side
    65,881.09x = 3,242,582,930.86
  5. Step 5: Solve for x
    x = 3,242,582,930.86/65,881.09
  6. Step 6: Final answer
    x = 49,218.72

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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.