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Finding the Fourth Proportional to 128,967.80, 193,451.70 and 54,063.05

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Solution

The fourth proportional to 128,967.80, 193,451.70 and 54,063.05 is: 81,094.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,967.80 : 193,451.70 = 54,063.05 : x
  2. Step 2: Convert to fraction form
    128,967.80/193,451.70 = 54,063.05/x
  3. Step 3: Cross multiply
    128,967.80x = 193,451.70 × 54,063.05
  4. Step 4: Simplify right side
    128,967.80x = 10,458,588,929.69
  5. Step 5: Solve for x
    x = 10,458,588,929.69/128,967.80
  6. Step 6: Final answer
    x = 81,094.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.