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Finding the Fourth Proportional to 86,556.40, 129,852.15 and 49,134.40

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Solution

The fourth proportional to 86,556.40, 129,852.15 and 49,134.40 is: 73,711.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,556.40 : 129,852.15 = 49,134.40 : x
  2. Step 2: Convert to fraction form
    86,556.40/129,852.15 = 49,134.40/x
  3. Step 3: Cross multiply
    86,556.40x = 129,852.15 × 49,134.40
  4. Step 4: Simplify right side
    86,556.40x = 6,380,207,478.96
  5. Step 5: Solve for x
    x = 6,380,207,478.96/86,556.40
  6. Step 6: Final answer
    x = 73,711.56

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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.