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Finding the Fourth Proportional to 158,448, 218,658.24 and 91,380

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Solution

The fourth proportional to 158,448, 218,658.24 and 91,380 is: 126,104.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,448 : 218,658.24 = 91,380 : x
  2. Step 2: Convert to fraction form
    158,448/218,658.24 = 91,380/x
  3. Step 3: Cross multiply
    158,448x = 218,658.24 × 91,380
  4. Step 4: Simplify right side
    158,448x = 19,980,989,971.20
  5. Step 5: Solve for x
    x = 19,980,989,971.20/158,448
  6. Step 6: Final answer
    x = 126,104.40

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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.