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Finding the Fourth Proportional to 100,608,963.20, 150,913,444.80 and 80,453,571.20

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Solution

The fourth proportional to 100,608,963.20, 150,913,444.80 and 80,453,571.20 is: 120,680,356.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,608,963.20 : 150,913,444.80 = 80,453,571.20 : x
  2. Step 2: Convert to fraction form
    100,608,963.20/150,913,444.80 = 80,453,571.20/x
  3. Step 3: Cross multiply
    100,608,963.20x = 150,913,444.80 × 80,453,571.20
  4. Step 4: Simplify right side
    100,608,963.20x = 12,141,525,576,254,072
  5. Step 5: Solve for x
    x = 12,141,525,576,254,072/100,608,963.20
  6. Step 6: Final answer
    x = 120,680,356.80

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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.