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Finding the Fourth Proportional to 69,982,356.12, 105,020,356.71 and 29,041,793.88

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Solution

The fourth proportional to 69,982,356.12, 105,020,356.71 and 29,041,793.88 is: 43,582,121.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,982,356.12 : 105,020,356.71 = 29,041,793.88 : x
  2. Step 2: Convert to fraction form
    69,982,356.12/105,020,356.71 = 29,041,793.88/x
  3. Step 3: Cross multiply
    69,982,356.12x = 105,020,356.71 × 29,041,793.88
  4. Step 4: Simplify right side
    69,982,356.12x = 3,049,979,552,775,894.50
  5. Step 5: Solve for x
    x = 3,049,979,552,775,894.50/69,982,356.12
  6. Step 6: Final answer
    x = 43,582,121.58

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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.