Home / 105,418.58-145,478.97-57,672.72

Finding the Fourth Proportional to 105,418.58, 145,478.97 and 57,672.72

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Solution

The fourth proportional to 105,418.58, 145,478.97 and 57,672.72 is: 79,589.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,418.58 : 145,478.97 = 57,672.72 : x
  2. Step 2: Convert to fraction form
    105,418.58/145,478.97 = 57,672.72/x
  3. Step 3: Cross multiply
    105,418.58x = 145,478.97 × 57,672.72
  4. Step 4: Simplify right side
    105,418.58x = 8,390,167,902.70
  5. Step 5: Solve for x
    x = 8,390,167,902.70/105,418.58
  6. Step 6: Final answer
    x = 79,589.08

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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.