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Finding the Fourth Proportional to 86,079.84, 118,790.64 and 48,354

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Solution

The fourth proportional to 86,079.84, 118,790.64 and 48,354 is: 66,728.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,079.84 : 118,790.64 = 48,354 : x
  2. Step 2: Convert to fraction form
    86,079.84/118,790.64 = 48,354/x
  3. Step 3: Cross multiply
    86,079.84x = 118,790.64 × 48,354
  4. Step 4: Simplify right side
    86,079.84x = 5,744,002,606.56
  5. Step 5: Solve for x
    x = 5,744,002,606.56/86,079.84
  6. Step 6: Final answer
    x = 66,728.78

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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.