Home / 142,377.20-196,484.63-78,719.09

Finding the Fourth Proportional to 142,377.20, 196,484.63 and 78,719.09

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Solution

The fourth proportional to 142,377.20, 196,484.63 and 78,719.09 is: 108,634.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,377.20 : 196,484.63 = 78,719.09 : x
  2. Step 2: Convert to fraction form
    142,377.20/196,484.63 = 78,719.09/x
  3. Step 3: Cross multiply
    142,377.20x = 196,484.63 × 78,719.09
  4. Step 4: Simplify right side
    142,377.20x = 15,467,089,896.57
  5. Step 5: Solve for x
    x = 15,467,089,896.57/142,377.20
  6. Step 6: Final answer
    x = 108,634.60

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1.5x scale

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.