Home / 81,002.75-121,510.47-21,837.52

Finding the Fourth Proportional to 81,002.75, 121,510.47 and 21,837.52

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Solution

The fourth proportional to 81,002.75, 121,510.47 and 21,837.52 is: 32,757.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,002.75 : 121,510.47 = 21,837.52 : x
  2. Step 2: Convert to fraction form
    81,002.75/121,510.47 = 21,837.52/x
  3. Step 3: Cross multiply
    81,002.75x = 121,510.47 × 21,837.52
  4. Step 4: Simplify right side
    81,002.75x = 2,653,486,711.28
  5. Step 5: Solve for x
    x = 2,653,486,711.28/81,002.75
  6. Step 6: Final answer
    x = 32,757.98

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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.