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Finding the Fourth Proportional to 134,758.50, 186,039.63 and 81,055.50

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Solution

The fourth proportional to 134,758.50, 186,039.63 and 81,055.50 is: 111,900.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,758.50 : 186,039.63 = 81,055.50 : x
  2. Step 2: Convert to fraction form
    134,758.50/186,039.63 = 81,055.50/x
  3. Step 3: Cross multiply
    134,758.50x = 186,039.63 × 81,055.50
  4. Step 4: Simplify right side
    134,758.50x = 15,079,535,229.47
  5. Step 5: Solve for x
    x = 15,079,535,229.47/134,758.50
  6. Step 6: Final answer
    x = 111,900.44

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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.