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Finding the Fourth Proportional to 388,339,909.20, 582,509,863.80 and 101,125,573.20

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Solution

The fourth proportional to 388,339,909.20, 582,509,863.80 and 101,125,573.20 is: 151,688,359.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,339,909.20 : 582,509,863.80 = 101,125,573.20 : x
  2. Step 2: Convert to fraction form
    388,339,909.20/582,509,863.80 = 101,125,573.20/x
  3. Step 3: Cross multiply
    388,339,909.20x = 582,509,863.80 × 101,125,573.20
  4. Step 4: Simplify right side
    388,339,909.20x = 58,906,643,871,428,928
  5. Step 5: Solve for x
    x = 58,906,643,871,428,928/388,339,909.20
  6. Step 6: Final answer
    x = 151,688,359.80

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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.