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Finding the Fourth Proportional to 68,686.80, 102,953.40 and 39,118.80

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Solution

The fourth proportional to 68,686.80, 102,953.40 and 39,118.80 is: 58,634.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,686.80 : 102,953.40 = 39,118.80 : x
  2. Step 2: Convert to fraction form
    68,686.80/102,953.40 = 39,118.80/x
  3. Step 3: Cross multiply
    68,686.80x = 102,953.40 × 39,118.80
  4. Step 4: Simplify right side
    68,686.80x = 4,027,413,463.92
  5. Step 5: Solve for x
    x = 4,027,413,463.92/68,686.80
  6. Step 6: Final answer
    x = 58,634.46

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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.