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Finding the Fourth Proportional to 65,803.86, 90,767.51 and 43,144.31

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Solution

The fourth proportional to 65,803.86, 90,767.51 and 43,144.31 is: 59,511.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,803.86 : 90,767.51 = 43,144.31 : x
  2. Step 2: Convert to fraction form
    65,803.86/90,767.51 = 43,144.31/x
  3. Step 3: Cross multiply
    65,803.86x = 90,767.51 × 43,144.31
  4. Step 4: Simplify right side
    65,803.86x = 3,916,100,919.81
  5. Step 5: Solve for x
    x = 3,916,100,919.81/65,803.86
  6. Step 6: Final answer
    x = 59,511.72

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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.