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Finding the Fourth Proportional to 139,207.76, 208,811.40 and 50,461.04

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Solution

The fourth proportional to 139,207.76, 208,811.40 and 50,461.04 is: 75,691.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,207.76 : 208,811.40 = 50,461.04 : x
  2. Step 2: Convert to fraction form
    139,207.76/208,811.40 = 50,461.04/x
  3. Step 3: Cross multiply
    139,207.76x = 208,811.40 × 50,461.04
  4. Step 4: Simplify right side
    139,207.76x = 10,536,840,407.86
  5. Step 5: Solve for x
    x = 10,536,840,407.86/139,207.76
  6. Step 6: Final answer
    x = 75,691.47

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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.