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Finding the Fourth Proportional to 90,869,578.80, 136,305,145.80 and 30,285,304.80

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Solution

The fourth proportional to 90,869,578.80, 136,305,145.80 and 30,285,304.80 is: 45,428,216.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,869,578.80 : 136,305,145.80 = 30,285,304.80 : x
  2. Step 2: Convert to fraction form
    90,869,578.80/136,305,145.80 = 30,285,304.80/x
  3. Step 3: Cross multiply
    90,869,578.80x = 136,305,145.80 × 30,285,304.80
  4. Step 4: Simplify right side
    90,869,578.80x = 4,128,042,886,361,440.50
  5. Step 5: Solve for x
    x = 4,128,042,886,361,440.50/90,869,578.80
  6. Step 6: Final answer
    x = 45,428,216.36

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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.