Home / 142,440.20-196,564.08-78,776.60

Finding the Fourth Proportional to 142,440.20, 196,564.08 and 78,776.60

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Solution

The fourth proportional to 142,440.20, 196,564.08 and 78,776.60 is: 108,709.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,440.20 : 196,564.08 = 78,776.60 : x
  2. Step 2: Convert to fraction form
    142,440.20/196,564.08 = 78,776.60/x
  3. Step 3: Cross multiply
    142,440.20x = 196,564.08 × 78,776.60
  4. Step 4: Simplify right side
    142,440.20x = 15,484,649,904.53
  5. Step 5: Solve for x
    x = 15,484,649,904.53/142,440.20
  6. Step 6: Final answer
    x = 108,709.83

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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.