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Finding the Fourth Proportional to 136,009.76, 187,687.78 and 75,579.86

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Solution

The fourth proportional to 136,009.76, 187,687.78 and 75,579.86 is: 104,297.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,009.76 : 187,687.78 = 75,579.86 : x
  2. Step 2: Convert to fraction form
    136,009.76/187,687.78 = 75,579.86/x
  3. Step 3: Cross multiply
    136,009.76x = 187,687.78 × 75,579.86
  4. Step 4: Simplify right side
    136,009.76x = 14,185,416,325.06
  5. Step 5: Solve for x
    x = 14,185,416,325.06/136,009.76
  6. Step 6: Final answer
    x = 104,297.05

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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.