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Finding the Fourth Proportional to 138,611.95, 207,886.55 and 63,660.04

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Solution

The fourth proportional to 138,611.95, 207,886.55 and 63,660.04 is: 95,475.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,611.95 : 207,886.55 = 63,660.04 : x
  2. Step 2: Convert to fraction form
    138,611.95/207,886.55 = 63,660.04/x
  3. Step 3: Cross multiply
    138,611.95x = 207,886.55 × 63,660.04
  4. Step 4: Simplify right side
    138,611.95x = 13,234,064,730.73
  5. Step 5: Solve for x
    x = 13,234,064,730.73/138,611.95
  6. Step 6: Final answer
    x = 95,475.64

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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.