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Finding the Fourth Proportional to 138,621.08, 207,894.72 and 38,775.08

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Solution

The fourth proportional to 138,621.08, 207,894.72 and 38,775.08 is: 58,152.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,621.08 : 207,894.72 = 38,775.08 : x
  2. Step 2: Convert to fraction form
    138,621.08/207,894.72 = 38,775.08/x
  3. Step 3: Cross multiply
    138,621.08x = 207,894.72 × 38,775.08
  4. Step 4: Simplify right side
    138,621.08x = 8,061,134,399.58
  5. Step 5: Solve for x
    x = 8,061,134,399.58/138,621.08
  6. Step 6: Final answer
    x = 58,152.30

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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.