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Finding the Fourth Proportional to 143,760.66, 215,553.15 and 68,903.70

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Solution

The fourth proportional to 143,760.66, 215,553.15 and 68,903.70 is: 103,313.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,760.66 : 215,553.15 = 68,903.70 : x
  2. Step 2: Convert to fraction form
    143,760.66/215,553.15 = 68,903.70/x
  3. Step 3: Cross multiply
    143,760.66x = 215,553.15 × 68,903.70
  4. Step 4: Simplify right side
    143,760.66x = 14,852,409,581.66
  5. Step 5: Solve for x
    x = 14,852,409,581.66/143,760.66
  6. Step 6: Final answer
    x = 103,313.45

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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.