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Finding the Fourth Proportional to 66,917,368.80, 100,380,850.92 and 28,016,674.92

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Solution

The fourth proportional to 66,917,368.80, 100,380,850.92 and 28,016,674.92 is: 42,027,021.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,917,368.80 : 100,380,850.92 = 28,016,674.92 : x
  2. Step 2: Convert to fraction form
    66,917,368.80/100,380,850.92 = 28,016,674.92/x
  3. Step 3: Cross multiply
    66,917,368.80x = 100,380,850.92 × 28,016,674.92
  4. Step 4: Simplify right side
    66,917,368.80x = 2,812,337,668,418,623
  5. Step 5: Solve for x
    x = 2,812,337,668,418,623/66,917,368.80
  6. Step 6: Final answer
    x = 42,027,021.07

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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.