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Finding the Fourth Proportional to 91,207.80, 136,811.70 and 49,217.40

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Solution

The fourth proportional to 91,207.80, 136,811.70 and 49,217.40 is: 73,826.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,207.80 : 136,811.70 = 49,217.40 : x
  2. Step 2: Convert to fraction form
    91,207.80/136,811.70 = 49,217.40/x
  3. Step 3: Cross multiply
    91,207.80x = 136,811.70 × 49,217.40
  4. Step 4: Simplify right side
    91,207.80x = 6,733,516,163.58
  5. Step 5: Solve for x
    x = 6,733,516,163.58/91,207.80
  6. Step 6: Final answer
    x = 73,826.10

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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.