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Finding the Fourth Proportional to 138,611.45, 207,885.80 and 63,659.54

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Solution

The fourth proportional to 138,611.45, 207,885.80 and 63,659.54 is: 95,474.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,611.45 : 207,885.80 = 63,659.54 : x
  2. Step 2: Convert to fraction form
    138,611.45/207,885.80 = 63,659.54/x
  3. Step 3: Cross multiply
    138,611.45x = 207,885.80 × 63,659.54
  4. Step 4: Simplify right side
    138,611.45x = 13,233,913,042.81
  5. Step 5: Solve for x
    x = 13,233,913,042.81/138,611.45
  6. Step 6: Final answer
    x = 95,474.89

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1.5x scale

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.