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Finding the Fourth Proportional to 109,978.78, 151,783.05 and 62,235.20

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Solution

The fourth proportional to 109,978.78, 151,783.05 and 62,235.20 is: 85,891.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,978.78 : 151,783.05 = 62,235.20 : x
  2. Step 2: Convert to fraction form
    109,978.78/151,783.05 = 62,235.20/x
  3. Step 3: Cross multiply
    109,978.78x = 151,783.05 × 62,235.20
  4. Step 4: Simplify right side
    109,978.78x = 9,446,248,473.36
  5. Step 5: Solve for x
    x = 9,446,248,473.36/109,978.78
  6. Step 6: Final answer
    x = 85,891.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.