Home / 76,971,396.31-115,456,131.07-18,679,557.13

Finding the Fourth Proportional to 76,971,396.31, 115,456,131.07 and 18,679,557.13

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Solution

The fourth proportional to 76,971,396.31, 115,456,131.07 and 18,679,557.13 is: 28,019,101.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,971,396.31 : 115,456,131.07 = 18,679,557.13 : x
  2. Step 2: Convert to fraction form
    76,971,396.31/115,456,131.07 = 18,679,557.13/x
  3. Step 3: Cross multiply
    76,971,396.31x = 115,456,131.07 × 18,679,557.13
  4. Step 4: Simplify right side
    76,971,396.31x = 2,156,669,396,330,832.75
  5. Step 5: Solve for x
    x = 2,156,669,396,330,832.75/76,971,396.31
  6. Step 6: Final answer
    x = 28,019,101.90

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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.