Home / 81,215,318.80-121,785,187.08-30,083,608.72

Finding the Fourth Proportional to 81,215,318.80, 121,785,187.08 and 30,083,608.72

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Solution

The fourth proportional to 81,215,318.80, 121,785,187.08 and 30,083,608.72 is: 45,111,414.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,215,318.80 : 121,785,187.08 = 30,083,608.72 : x
  2. Step 2: Convert to fraction form
    81,215,318.80/121,785,187.08 = 30,083,608.72/x
  3. Step 3: Cross multiply
    81,215,318.80x = 121,785,187.08 × 30,083,608.72
  4. Step 4: Simplify right side
    81,215,318.80x = 3,663,737,916,006,719
  5. Step 5: Solve for x
    x = 3,663,737,916,006,719/81,215,318.80
  6. Step 6: Final answer
    x = 45,111,414.57

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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.