Home / 126,005.20-189,289.40-105,269.20

Finding the Fourth Proportional to 126,005.20, 189,289.40 and 105,269.20

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Solution

The fourth proportional to 126,005.20, 189,289.40 and 105,269.20 is: 158,139.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,005.20 : 189,289.40 = 105,269.20 : x
  2. Step 2: Convert to fraction form
    126,005.20/189,289.40 = 105,269.20/x
  3. Step 3: Cross multiply
    126,005.20x = 189,289.40 × 105,269.20
  4. Step 4: Simplify right side
    126,005.20x = 19,926,343,706.48
  5. Step 5: Solve for x
    x = 19,926,343,706.48/126,005.20
  6. Step 6: Final answer
    x = 158,139.06

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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.