Home / 81,021.88-121,557.14-38,359.83

Finding the Fourth Proportional to 81,021.88, 121,557.14 and 38,359.83

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Solution

The fourth proportional to 81,021.88, 121,557.14 and 38,359.83 is: 57,551.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,021.88 : 121,557.14 = 38,359.83 : x
  2. Step 2: Convert to fraction form
    81,021.88/121,557.14 = 38,359.83/x
  3. Step 3: Cross multiply
    81,021.88x = 121,557.14 × 38,359.83
  4. Step 4: Simplify right side
    81,021.88x = 4,662,911,111.65
  5. Step 5: Solve for x
    x = 4,662,911,111.65/81,021.88
  6. Step 6: Final answer
    x = 57,551.26

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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.