Home / 126,492.79-189,299.04-78,438.94

Finding the Fourth Proportional to 126,492.79, 189,299.04 and 78,438.94

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Solution

The fourth proportional to 126,492.79, 189,299.04 and 78,438.94 is: 117,385.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,492.79 : 189,299.04 = 78,438.94 : x
  2. Step 2: Convert to fraction form
    126,492.79/189,299.04 = 78,438.94/x
  3. Step 3: Cross multiply
    126,492.79x = 189,299.04 × 78,438.94
  4. Step 4: Simplify right side
    126,492.79x = 14,848,416,040.62
  5. Step 5: Solve for x
    x = 14,848,416,040.62/126,492.79
  6. Step 6: Final answer
    x = 117,385.47

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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.