Home / 81,175.50-121,813.07-34,428.38

Finding the Fourth Proportional to 81,175.50, 121,813.07 and 34,428.38

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Solution

The fourth proportional to 81,175.50, 121,813.07 and 34,428.38 is: 51,663.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,175.50 : 121,813.07 = 34,428.38 : x
  2. Step 2: Convert to fraction form
    81,175.50/121,813.07 = 34,428.38/x
  3. Step 3: Cross multiply
    81,175.50x = 121,813.07 × 34,428.38
  4. Step 4: Simplify right side
    81,175.50x = 4,193,825,881.72
  5. Step 5: Solve for x
    x = 4,193,825,881.72/81,175.50
  6. Step 6: Final answer
    x = 51,663.69

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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.