Home / 66,021.78-99,031.51-60,879.20

Finding the Fourth Proportional to 66,021.78, 99,031.51 and 60,879.20

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Solution

The fourth proportional to 66,021.78, 99,031.51 and 60,879.20 is: 91,317.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,021.78 : 99,031.51 = 60,879.20 : x
  2. Step 2: Convert to fraction form
    66,021.78/99,031.51 = 60,879.20/x
  3. Step 3: Cross multiply
    66,021.78x = 99,031.51 × 60,879.20
  4. Step 4: Simplify right side
    66,021.78x = 6,028,958,684.53
  5. Step 5: Solve for x
    x = 6,028,958,684.53/66,021.78
  6. Step 6: Final answer
    x = 91,317.72

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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.