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Finding the Fourth Proportional to 68,145.98, 102,228.69 and 21,402.50

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Solution

The fourth proportional to 68,145.98, 102,228.69 and 21,402.50 is: 32,106.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,145.98 : 102,228.69 = 21,402.50 : x
  2. Step 2: Convert to fraction form
    68,145.98/102,228.69 = 21,402.50/x
  3. Step 3: Cross multiply
    68,145.98x = 102,228.69 × 21,402.50
  4. Step 4: Simplify right side
    68,145.98x = 2,187,949,537.73
  5. Step 5: Solve for x
    x = 2,187,949,537.73/68,145.98
  6. Step 6: Final answer
    x = 32,106.80

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1.5x scale

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.