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Finding the Fourth Proportional to 181,811.80, 272,717.70 and 128,667.70

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Solution

The fourth proportional to 181,811.80, 272,717.70 and 128,667.70 is: 193,001.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,811.80 : 272,717.70 = 128,667.70 : x
  2. Step 2: Convert to fraction form
    181,811.80/272,717.70 = 128,667.70/x
  3. Step 3: Cross multiply
    181,811.80x = 272,717.70 × 128,667.70
  4. Step 4: Simplify right side
    181,811.80x = 35,089,959,208.29
  5. Step 5: Solve for x
    x = 35,089,959,208.29/181,811.80
  6. Step 6: Final answer
    x = 193,001.55

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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.