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Finding the Fourth Proportional to 143,449.60, 215,145.60 and 68,569.60

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Solution

The fourth proportional to 143,449.60, 215,145.60 and 68,569.60 is: 102,840.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,449.60 : 215,145.60 = 68,569.60 : x
  2. Step 2: Convert to fraction form
    143,449.60/215,145.60 = 68,569.60/x
  3. Step 3: Cross multiply
    143,449.60x = 215,145.60 × 68,569.60
  4. Step 4: Simplify right side
    143,449.60x = 14,752,447,733.76
  5. Step 5: Solve for x
    x = 14,752,447,733.76/143,449.60
  6. Step 6: Final answer
    x = 102,840.63

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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.