Home / 81,730,106.38-122,595,611.07-20,319,265.15

Finding the Fourth Proportional to 81,730,106.38, 122,595,611.07 and 20,319,265.15

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Solution

The fourth proportional to 81,730,106.38, 122,595,611.07 and 20,319,265.15 is: 30,479,009.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,730,106.38 : 122,595,611.07 = 20,319,265.15 : x
  2. Step 2: Convert to fraction form
    81,730,106.38/122,595,611.07 = 20,319,265.15/x
  3. Step 3: Cross multiply
    81,730,106.38x = 122,595,611.07 × 20,319,265.15
  4. Step 4: Simplify right side
    81,730,106.38x = 2,491,052,727,557,605
  5. Step 5: Solve for x
    x = 2,491,052,727,557,605/81,730,106.38
  6. Step 6: Final answer
    x = 30,479,009.97

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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.