Home / 138,764.55-191,532.05-78,370.54

Finding the Fourth Proportional to 138,764.55, 191,532.05 and 78,370.54

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Solution

The fourth proportional to 138,764.55, 191,532.05 and 78,370.54 is: 108,172.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,764.55 : 191,532.05 = 78,370.54 : x
  2. Step 2: Convert to fraction form
    138,764.55/191,532.05 = 78,370.54/x
  3. Step 3: Cross multiply
    138,764.55x = 191,532.05 × 78,370.54
  4. Step 4: Simplify right side
    138,764.55x = 15,010,470,185.81
  5. Step 5: Solve for x
    x = 15,010,470,185.81/138,764.55
  6. Step 6: Final answer
    x = 108,172.23

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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.