Home / 126,239.46-189,611.40-78,938.70

Finding the Fourth Proportional to 126,239.46, 189,611.40 and 78,938.70

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Solution

The fourth proportional to 126,239.46, 189,611.40 and 78,938.70 is: 118,565.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,239.46 : 189,611.40 = 78,938.70 : x
  2. Step 2: Convert to fraction form
    126,239.46/189,611.40 = 78,938.70/x
  3. Step 3: Cross multiply
    126,239.46x = 189,611.40 × 78,938.70
  4. Step 4: Simplify right side
    126,239.46x = 14,967,677,421.18
  5. Step 5: Solve for x
    x = 14,967,677,421.18/126,239.46
  6. Step 6: Final answer
    x = 118,565.76

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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.