Home / 105,558.72-145,671.28-57,161.20

Finding the Fourth Proportional to 105,558.72, 145,671.28 and 57,161.20

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Solution

The fourth proportional to 105,558.72, 145,671.28 and 57,161.20 is: 78,882.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,558.72 : 145,671.28 = 57,161.20 : x
  2. Step 2: Convert to fraction form
    105,558.72/145,671.28 = 57,161.20/x
  3. Step 3: Cross multiply
    105,558.72x = 145,671.28 × 57,161.20
  4. Step 4: Simplify right side
    105,558.72x = 8,326,745,170.34
  5. Step 5: Solve for x
    x = 8,326,745,170.34/105,558.72
  6. Step 6: Final answer
    x = 78,882.59

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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.