Home / 81,088,968.56-121,632,438.36-19,678,636.04

Finding the Fourth Proportional to 81,088,968.56, 121,632,438.36 and 19,678,636.04

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Solution

The fourth proportional to 81,088,968.56, 121,632,438.36 and 19,678,636.04 is: 29,517,707.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,088,968.56 : 121,632,438.36 = 19,678,636.04 : x
  2. Step 2: Convert to fraction form
    81,088,968.56/121,632,438.36 = 19,678,636.04/x
  3. Step 3: Cross multiply
    81,088,968.56x = 121,632,438.36 × 19,678,636.04
  4. Step 4: Simplify right side
    81,088,968.56x = 2,393,560,485,144,174.50
  5. Step 5: Solve for x
    x = 2,393,560,485,144,174.50/81,088,968.56
  6. Step 6: Final answer
    x = 29,517,707.87

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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.