Home / 115,281.88-172,922.30-45,111.72

Finding the Fourth Proportional to 115,281.88, 172,922.30 and 45,111.72

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Solution

The fourth proportional to 115,281.88, 172,922.30 and 45,111.72 is: 67,667.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,281.88 : 172,922.30 = 45,111.72 : x
  2. Step 2: Convert to fraction form
    115,281.88/172,922.30 = 45,111.72/x
  3. Step 3: Cross multiply
    115,281.88x = 172,922.30 × 45,111.72
  4. Step 4: Simplify right side
    115,281.88x = 7,800,822,379.36
  5. Step 5: Solve for x
    x = 7,800,822,379.36/115,281.88
  6. Step 6: Final answer
    x = 67,667.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.