Home / 221,127.47-331,761.37-78,969.74

Finding the Fourth Proportional to 221,127.47, 331,761.37 and 78,969.74

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Solution

The fourth proportional to 221,127.47, 331,761.37 and 78,969.74 is: 118,479.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,127.47 : 331,761.37 = 78,969.74 : x
  2. Step 2: Convert to fraction form
    221,127.47/331,761.37 = 78,969.74/x
  3. Step 3: Cross multiply
    221,127.47x = 331,761.37 × 78,969.74
  4. Step 4: Simplify right side
    221,127.47x = 26,199,107,422.78
  5. Step 5: Solve for x
    x = 26,199,107,422.78/221,127.47
  6. Step 6: Final answer
    x = 118,479.66

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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.