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Finding the Fourth Proportional to 388,101.40, 582,176.70 and 121,872.40

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Solution

The fourth proportional to 388,101.40, 582,176.70 and 121,872.40 is: 182,816.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,101.40 : 582,176.70 = 121,872.40 : x
  2. Step 2: Convert to fraction form
    388,101.40/582,176.70 = 121,872.40/x
  3. Step 3: Cross multiply
    388,101.40x = 582,176.70 × 121,872.40
  4. Step 4: Simplify right side
    388,101.40x = 70,951,271,653.08
  5. Step 5: Solve for x
    x = 70,951,271,653.08/388,101.40
  6. Step 6: Final answer
    x = 182,816.32

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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.