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Finding the Fourth Proportional to 143,397.84, 215,096.77 and 68,290.29

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Solution

The fourth proportional to 143,397.84, 215,096.77 and 68,290.29 is: 102,435.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,397.84 : 215,096.77 = 68,290.29 : x
  2. Step 2: Convert to fraction form
    143,397.84/215,096.77 = 68,290.29/x
  3. Step 3: Cross multiply
    143,397.84x = 215,096.77 × 68,290.29
  4. Step 4: Simplify right side
    143,397.84x = 14,689,020,502.59
  5. Step 5: Solve for x
    x = 14,689,020,502.59/143,397.84
  6. Step 6: Final answer
    x = 102,435.44

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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.