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Finding the Fourth Proportional to 136,753.83, 188,719.88 and 76,323.81

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Solution

The fourth proportional to 136,753.83, 188,719.88 and 76,323.81 is: 105,326.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,753.83 : 188,719.88 = 76,323.81 : x
  2. Step 2: Convert to fraction form
    136,753.83/188,719.88 = 76,323.81/x
  3. Step 3: Cross multiply
    136,753.83x = 188,719.88 × 76,323.81
  4. Step 4: Simplify right side
    136,753.83x = 14,403,819,882.72
  5. Step 5: Solve for x
    x = 14,403,819,882.72/136,753.83
  6. Step 6: Final answer
    x = 105,326.63

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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.