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Finding the Fourth Proportional to 136,174.50, 187,920.81 and 76,558.50

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Solution

The fourth proportional to 136,174.50, 187,920.81 and 76,558.50 is: 105,650.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,174.50 : 187,920.81 = 76,558.50 : x
  2. Step 2: Convert to fraction form
    136,174.50/187,920.81 = 76,558.50/x
  3. Step 3: Cross multiply
    136,174.50x = 187,920.81 × 76,558.50
  4. Step 4: Simplify right side
    136,174.50x = 14,386,935,332.39
  5. Step 5: Solve for x
    x = 14,386,935,332.39/136,174.50
  6. Step 6: Final answer
    x = 105,650.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.