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Finding the Fourth Proportional to 84,359.81, 126,602.33 and 39,986.66

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Solution

The fourth proportional to 84,359.81, 126,602.33 and 39,986.66 is: 60,009.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,359.81 : 126,602.33 = 39,986.66 : x
  2. Step 2: Convert to fraction form
    84,359.81/126,602.33 = 39,986.66/x
  3. Step 3: Cross multiply
    84,359.81x = 126,602.33 × 39,986.66
  4. Step 4: Simplify right side
    84,359.81x = 5,062,404,441.49
  5. Step 5: Solve for x
    x = 5,062,404,441.49/84,359.81
  6. Step 6: Final answer
    x = 60,009.67

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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.