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Finding the Fourth Proportional to 98,644.72, 147,960.60 and 42,482.56

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Solution

The fourth proportional to 98,644.72, 147,960.60 and 42,482.56 is: 63,721.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,644.72 : 147,960.60 = 42,482.56 : x
  2. Step 2: Convert to fraction form
    98,644.72/147,960.60 = 42,482.56/x
  3. Step 3: Cross multiply
    98,644.72x = 147,960.60 × 42,482.56
  4. Step 4: Simplify right side
    98,644.72x = 6,285,745,067.14
  5. Step 5: Solve for x
    x = 6,285,745,067.14/98,644.72
  6. Step 6: Final answer
    x = 63,721.05

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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.