Home / 78,724,882.50-118,086,902.28-20,432,517.87

Finding the Fourth Proportional to 78,724,882.50, 118,086,902.28 and 20,432,517.87

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Solution

The fourth proportional to 78,724,882.50, 118,086,902.28 and 20,432,517.87 is: 30,648,667.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,724,882.50 : 118,086,902.28 = 20,432,517.87 : x
  2. Step 2: Convert to fraction form
    78,724,882.50/118,086,902.28 = 20,432,517.87/x
  3. Step 3: Cross multiply
    78,724,882.50x = 118,086,902.28 × 20,432,517.87
  4. Step 4: Simplify right side
    78,724,882.50x = 2,412,812,741,049,044
  5. Step 5: Solve for x
    x = 2,412,812,741,049,044/78,724,882.50
  6. Step 6: Final answer
    x = 30,648,667.42

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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.