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Finding the Fourth Proportional to 272,556.81, 408,852.54 and 85,575.69

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Solution

The fourth proportional to 272,556.81, 408,852.54 and 85,575.69 is: 128,368.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,556.81 : 408,852.54 = 85,575.69 : x
  2. Step 2: Convert to fraction form
    272,556.81/408,852.54 = 85,575.69/x
  3. Step 3: Cross multiply
    272,556.81x = 408,852.54 × 85,575.69
  4. Step 4: Simplify right side
    272,556.81x = 34,987,838,218.75
  5. Step 5: Solve for x
    x = 34,987,838,218.75/272,556.81
  6. Step 6: Final answer
    x = 128,368.97

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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.