Home / 66,110.13-99,172.25-21,115.77

Finding the Fourth Proportional to 66,110.13, 99,172.25 and 21,115.77

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Solution

The fourth proportional to 66,110.13, 99,172.25 and 21,115.77 is: 31,675.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,110.13 : 99,172.25 = 21,115.77 : x
  2. Step 2: Convert to fraction form
    66,110.13/99,172.25 = 21,115.77/x
  3. Step 3: Cross multiply
    66,110.13x = 99,172.25 × 21,115.77
  4. Step 4: Simplify right side
    66,110.13x = 2,094,098,315.80
  5. Step 5: Solve for x
    x = 2,094,098,315.80/66,110.13
  6. Step 6: Final answer
    x = 31,675.91

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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.