Home / 115,280.88-172,920.80-45,110.72

Finding the Fourth Proportional to 115,280.88, 172,920.80 and 45,110.72

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Solution

The fourth proportional to 115,280.88, 172,920.80 and 45,110.72 is: 67,665.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,280.88 : 172,920.80 = 45,110.72 : x
  2. Step 2: Convert to fraction form
    115,280.88/172,920.80 = 45,110.72/x
  3. Step 3: Cross multiply
    115,280.88x = 172,920.80 × 45,110.72
  4. Step 4: Simplify right side
    115,280.88x = 7,800,581,790.98
  5. Step 5: Solve for x
    x = 7,800,581,790.98/115,280.88
  6. Step 6: Final answer
    x = 67,665.88

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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.