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Finding the Fourth Proportional to 136,003.97, 187,686.29 and 74,749.50

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Solution

The fourth proportional to 136,003.97, 187,686.29 and 74,749.50 is: 103,154.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,003.97 : 187,686.29 = 74,749.50 : x
  2. Step 2: Convert to fraction form
    136,003.97/187,686.29 = 74,749.50/x
  3. Step 3: Cross multiply
    136,003.97x = 187,686.29 × 74,749.50
  4. Step 4: Simplify right side
    136,003.97x = 14,029,456,334.36
  5. Step 5: Solve for x
    x = 14,029,456,334.36/136,003.97
  6. Step 6: Final answer
    x = 103,154.76

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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.