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Finding the Fourth Proportional to 84,556.25, 126,848.96 and 28,401.76

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Solution

The fourth proportional to 84,556.25, 126,848.96 and 28,401.76 is: 42,607.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,556.25 : 126,848.96 = 28,401.76 : x
  2. Step 2: Convert to fraction form
    84,556.25/126,848.96 = 28,401.76/x
  3. Step 3: Cross multiply
    84,556.25x = 126,848.96 × 28,401.76
  4. Step 4: Simplify right side
    84,556.25x = 3,602,734,277.87
  5. Step 5: Solve for x
    x = 3,602,734,277.87/84,556.25
  6. Step 6: Final answer
    x = 42,607.54

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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.