Home / 77,201.36-115,790.19-21,045.98

Finding the Fourth Proportional to 77,201.36, 115,790.19 and 21,045.98

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Solution

The fourth proportional to 77,201.36, 115,790.19 and 21,045.98 is: 31,565.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,201.36 : 115,790.19 = 21,045.98 : x
  2. Step 2: Convert to fraction form
    77,201.36/115,790.19 = 21,045.98/x
  3. Step 3: Cross multiply
    77,201.36x = 115,790.19 × 21,045.98
  4. Step 4: Simplify right side
    77,201.36x = 2,436,918,022.94
  5. Step 5: Solve for x
    x = 2,436,918,022.94/77,201.36
  6. Step 6: Final answer
    x = 31,565.74

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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.