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Finding the Fourth Proportional to 68,902,507.80, 103,353,763.50 and 20,376,582.12

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Solution

The fourth proportional to 68,902,507.80, 103,353,763.50 and 20,376,582.12 is: 30,564,873.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,902,507.80 : 103,353,763.50 = 20,376,582.12 : x
  2. Step 2: Convert to fraction form
    68,902,507.80/103,353,763.50 = 20,376,582.12/x
  3. Step 3: Cross multiply
    68,902,507.80x = 103,353,763.50 × 20,376,582.12
  4. Step 4: Simplify right side
    68,902,507.80x = 2,105,996,449,368,808.75
  5. Step 5: Solve for x
    x = 2,105,996,449,368,808.75/68,902,507.80
  6. Step 6: Final answer
    x = 30,564,873.71

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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.