Home / 78,381.13-108,166.74-42,571.84

Finding the Fourth Proportional to 78,381.13, 108,166.74 and 42,571.84

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Solution

The fourth proportional to 78,381.13, 108,166.74 and 42,571.84 is: 58,749.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,381.13 : 108,166.74 = 42,571.84 : x
  2. Step 2: Convert to fraction form
    78,381.13/108,166.74 = 42,571.84/x
  3. Step 3: Cross multiply
    78,381.13x = 108,166.74 × 42,571.84
  4. Step 4: Simplify right side
    78,381.13x = 4,604,857,148.60
  5. Step 5: Solve for x
    x = 4,604,857,148.60/78,381.13
  6. Step 6: Final answer
    x = 58,749.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.