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Finding the Fourth Proportional to 143,510.02, 215,265.21 and 68,612.56

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Solution

The fourth proportional to 143,510.02, 215,265.21 and 68,612.56 is: 102,918.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,510.02 : 215,265.21 = 68,612.56 : x
  2. Step 2: Convert to fraction form
    143,510.02/215,265.21 = 68,612.56/x
  3. Step 3: Cross multiply
    143,510.02x = 215,265.21 × 68,612.56
  4. Step 4: Simplify right side
    143,510.02x = 14,769,897,137.04
  5. Step 5: Solve for x
    x = 14,769,897,137.04/143,510.02
  6. Step 6: Final answer
    x = 102,918.93

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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.