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Finding the Fourth Proportional to 85,752,080.70, 128,628,121.05 and 49,472,375.10

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Solution

The fourth proportional to 85,752,080.70, 128,628,121.05 and 49,472,375.10 is: 74,208,562.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,752,080.70 : 128,628,121.05 = 49,472,375.10 : x
  2. Step 2: Convert to fraction form
    85,752,080.70/128,628,121.05 = 49,472,375.10/x
  3. Step 3: Cross multiply
    85,752,080.70x = 128,628,121.05 × 49,472,375.10
  4. Step 4: Simplify right side
    85,752,080.70x = 6,363,538,652,993,806
  5. Step 5: Solve for x
    x = 6,363,538,652,993,806/85,752,080.70
  6. Step 6: Final answer
    x = 74,208,562.65

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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.