Home / 81,047.16-121,570.38-21,888.90

Finding the Fourth Proportional to 81,047.16, 121,570.38 and 21,888.90

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Solution

The fourth proportional to 81,047.16, 121,570.38 and 21,888.90 is: 32,833.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,047.16 : 121,570.38 = 21,888.90 : x
  2. Step 2: Convert to fraction form
    81,047.16/121,570.38 = 21,888.90/x
  3. Step 3: Cross multiply
    81,047.16x = 121,570.38 × 21,888.90
  4. Step 4: Simplify right side
    81,047.16x = 2,661,041,890.78
  5. Step 5: Solve for x
    x = 2,661,041,890.78/81,047.16
  6. Step 6: Final answer
    x = 32,833.25

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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.