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Finding the Fourth Proportional to 126,651.60, 189,860.76 and 60,123.06

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Solution

The fourth proportional to 126,651.60, 189,860.76 and 60,123.06 is: 90,129.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,651.60 : 189,860.76 = 60,123.06 : x
  2. Step 2: Convert to fraction form
    126,651.60/189,860.76 = 60,123.06/x
  3. Step 3: Cross multiply
    126,651.60x = 189,860.76 × 60,123.06
  4. Step 4: Simplify right side
    126,651.60x = 11,415,009,865.13
  5. Step 5: Solve for x
    x = 11,415,009,865.13/126,651.60
  6. Step 6: Final answer
    x = 90,129.22

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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.