Home / 81,030.28-121,559.69-27,709.72

Finding the Fourth Proportional to 81,030.28, 121,559.69 and 27,709.72

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Solution

The fourth proportional to 81,030.28, 121,559.69 and 27,709.72 is: 41,569.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,030.28 : 121,559.69 = 27,709.72 : x
  2. Step 2: Convert to fraction form
    81,030.28/121,559.69 = 27,709.72/x
  3. Step 3: Cross multiply
    81,030.28x = 121,559.69 × 27,709.72
  4. Step 4: Simplify right side
    81,030.28x = 3,368,384,973.19
  5. Step 5: Solve for x
    x = 3,368,384,973.19/81,030.28
  6. Step 6: Final answer
    x = 41,569.46

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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.