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Finding the Fourth Proportional to 143,390.61, 215,085.88 and 68,283.03

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Solution

The fourth proportional to 143,390.61, 215,085.88 and 68,283.03 is: 102,424.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,390.61 : 215,085.88 = 68,283.03 : x
  2. Step 2: Convert to fraction form
    143,390.61/215,085.88 = 68,283.03/x
  3. Step 3: Cross multiply
    143,390.61x = 215,085.88 × 68,283.03
  4. Step 4: Simplify right side
    143,390.61x = 14,686,715,596.62
  5. Step 5: Solve for x
    x = 14,686,715,596.62/143,390.61
  6. Step 6: Final answer
    x = 102,424.53

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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.