Home / 156,718.40-235,231.20-77,921.60

Finding the Fourth Proportional to 156,718.40, 235,231.20 and 77,921.60

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Solution

The fourth proportional to 156,718.40, 235,231.20 and 77,921.60 is: 116,958.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,718.40 : 235,231.20 = 77,921.60 : x
  2. Step 2: Convert to fraction form
    156,718.40/235,231.20 = 77,921.60/x
  3. Step 3: Cross multiply
    156,718.40x = 235,231.20 × 77,921.60
  4. Step 4: Simplify right side
    156,718.40x = 18,329,591,473.92
  5. Step 5: Solve for x
    x = 18,329,591,473.92/156,718.40
  6. Step 6: Final answer
    x = 116,958.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.