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Finding the Fourth Proportional to 98,647.72, 147,965.10 and 42,485.56

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Solution

The fourth proportional to 98,647.72, 147,965.10 and 42,485.56 is: 63,725.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,647.72 : 147,965.10 = 42,485.56 : x
  2. Step 2: Convert to fraction form
    98,647.72/147,965.10 = 42,485.56/x
  3. Step 3: Cross multiply
    98,647.72x = 147,965.10 × 42,485.56
  4. Step 4: Simplify right side
    98,647.72x = 6,286,380,133.96
  5. Step 5: Solve for x
    x = 6,286,380,133.96/98,647.72
  6. Step 6: Final answer
    x = 63,725.55

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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.