Home / 81,162.81-121,746.29-38,458.21

Finding the Fourth Proportional to 81,162.81, 121,746.29 and 38,458.21

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Solution

The fourth proportional to 81,162.81, 121,746.29 and 38,458.21 is: 57,688.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,162.81 : 121,746.29 = 38,458.21 : x
  2. Step 2: Convert to fraction form
    81,162.81/121,746.29 = 38,458.21/x
  3. Step 3: Cross multiply
    81,162.81x = 121,746.29 × 38,458.21
  4. Step 4: Simplify right side
    81,162.81x = 4,682,144,387.54
  5. Step 5: Solve for x
    x = 4,682,144,387.54/81,162.81
  6. Step 6: Final answer
    x = 57,688.30

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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.