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Finding the Fourth Proportional to 105,418.44, 145,480.89 and 57,671.79

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Solution

The fourth proportional to 105,418.44, 145,480.89 and 57,671.79 is: 79,588.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,418.44 : 145,480.89 = 57,671.79 : x
  2. Step 2: Convert to fraction form
    105,418.44/145,480.89 = 57,671.79/x
  3. Step 3: Cross multiply
    105,418.44x = 145,480.89 × 57,671.79
  4. Step 4: Simplify right side
    105,418.44x = 8,390,143,337.09
  5. Step 5: Solve for x
    x = 8,390,143,337.09/105,418.44
  6. Step 6: Final answer
    x = 79,588.95

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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.