Home / 81,034.09-121,551.13-21,869.66

Finding the Fourth Proportional to 81,034.09, 121,551.13 and 21,869.66

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Solution

The fourth proportional to 81,034.09, 121,551.13 and 21,869.66 is: 32,804.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,034.09 : 121,551.13 = 21,869.66 : x
  2. Step 2: Convert to fraction form
    81,034.09/121,551.13 = 21,869.66/x
  3. Step 3: Cross multiply
    81,034.09x = 121,551.13 × 21,869.66
  4. Step 4: Simplify right side
    81,034.09x = 2,658,282,216.93
  5. Step 5: Solve for x
    x = 2,658,282,216.93/81,034.09
  6. Step 6: Final answer
    x = 32,804.49

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1.5x scale

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.