Home / 142,289.56-196,342.50-78,618.64

Finding the Fourth Proportional to 142,289.56, 196,342.50 and 78,618.64

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Solution

The fourth proportional to 142,289.56, 196,342.50 and 78,618.64 is: 108,484.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,289.56 : 196,342.50 = 78,618.64 : x
  2. Step 2: Convert to fraction form
    142,289.56/196,342.50 = 78,618.64/x
  3. Step 3: Cross multiply
    142,289.56x = 196,342.50 × 78,618.64
  4. Step 4: Simplify right side
    142,289.56x = 15,436,180,324.20
  5. Step 5: Solve for x
    x = 15,436,180,324.20/142,289.56
  6. Step 6: Final answer
    x = 108,484.28

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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.