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Finding the Fourth Proportional to 388,102.40, 582,178.20 and 121,873.40

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Solution

The fourth proportional to 388,102.40, 582,178.20 and 121,873.40 is: 182,817.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,102.40 : 582,178.20 = 121,873.40 : x
  2. Step 2: Convert to fraction form
    388,102.40/582,178.20 = 121,873.40/x
  3. Step 3: Cross multiply
    388,102.40x = 582,178.20 × 121,873.40
  4. Step 4: Simplify right side
    388,102.40x = 70,952,036,639.88
  5. Step 5: Solve for x
    x = 70,952,036,639.88/388,102.40
  6. Step 6: Final answer
    x = 182,817.82

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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.