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Finding the Fourth Proportional to 126,656.60, 189,868.26 and 60,128.06

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Solution

The fourth proportional to 126,656.60, 189,868.26 and 60,128.06 is: 90,136.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,656.60 : 189,868.26 = 60,128.06 : x
  2. Step 2: Convert to fraction form
    126,656.60/189,868.26 = 60,128.06/x
  3. Step 3: Cross multiply
    126,656.60x = 189,868.26 × 60,128.06
  4. Step 4: Simplify right side
    126,656.60x = 11,416,410,129.38
  5. Step 5: Solve for x
    x = 11,416,410,129.38/126,656.60
  6. Step 6: Final answer
    x = 90,136.72

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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.