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Finding the Fourth Proportional to 143,965.60, 216,045.60 and 80,785.60

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Solution

The fourth proportional to 143,965.60, 216,045.60 and 80,785.60 is: 121,232.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,965.60 : 216,045.60 = 80,785.60 : x
  2. Step 2: Convert to fraction form
    143,965.60/216,045.60 = 80,785.60/x
  3. Step 3: Cross multiply
    143,965.60x = 216,045.60 × 80,785.60
  4. Step 4: Simplify right side
    143,965.60x = 17,453,373,423.36
  5. Step 5: Solve for x
    x = 17,453,373,423.36/143,965.60
  6. Step 6: Final answer
    x = 121,232.94

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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.