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Finding the Fourth Proportional to 228,787.86, 342,978.75 and 86,533.62

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Solution

The fourth proportional to 228,787.86, 342,978.75 and 86,533.62 is: 129,723.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,787.86 : 342,978.75 = 86,533.62 : x
  2. Step 2: Convert to fraction form
    228,787.86/342,978.75 = 86,533.62/x
  3. Step 3: Cross multiply
    228,787.86x = 342,978.75 × 86,533.62
  4. Step 4: Simplify right side
    228,787.86x = 29,679,192,820.58
  5. Step 5: Solve for x
    x = 29,679,192,820.58/228,787.86
  6. Step 6: Final answer
    x = 129,723.63

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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.