Home / 138,438.12-207,657.18-79,232.52

Finding the Fourth Proportional to 138,438.12, 207,657.18 and 79,232.52

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Solution

The fourth proportional to 138,438.12, 207,657.18 and 79,232.52 is: 118,848.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,438.12 : 207,657.18 = 79,232.52 : x
  2. Step 2: Convert to fraction form
    138,438.12/207,657.18 = 79,232.52/x
  3. Step 3: Cross multiply
    138,438.12x = 207,657.18 × 79,232.52
  4. Step 4: Simplify right side
    138,438.12x = 16,453,201,667.49
  5. Step 5: Solve for x
    x = 16,453,201,667.49/138,438.12
  6. Step 6: Final answer
    x = 118,848.78

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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.