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Finding the Fourth Proportional to 79,448, 109,641.12 and 43,641.36

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Solution

The fourth proportional to 79,448, 109,641.12 and 43,641.36 is: 60,226.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,448 : 109,641.12 = 43,641.36 : x
  2. Step 2: Convert to fraction form
    79,448/109,641.12 = 43,641.36/x
  3. Step 3: Cross multiply
    79,448x = 109,641.12 × 43,641.36
  4. Step 4: Simplify right side
    79,448x = 4,784,887,588.72
  5. Step 5: Solve for x
    x = 4,784,887,588.72/79,448
  6. Step 6: Final answer
    x = 60,226.66

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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.