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Finding the Fourth Proportional to 140,390.62, 210,508.81 and 69,156.52

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Solution

The fourth proportional to 140,390.62, 210,508.81 and 69,156.52 is: 103,696.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,390.62 : 210,508.81 = 69,156.52 : x
  2. Step 2: Convert to fraction form
    140,390.62/210,508.81 = 69,156.52/x
  3. Step 3: Cross multiply
    140,390.62x = 210,508.81 × 69,156.52
  4. Step 4: Simplify right side
    140,390.62x = 14,558,056,029.78
  5. Step 5: Solve for x
    x = 14,558,056,029.78/140,390.62
  6. Step 6: Final answer
    x = 103,696.79

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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.