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Finding the Fourth Proportional to 68,139.66, 102,225.93 and 21,392.52

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Solution

The fourth proportional to 68,139.66, 102,225.93 and 21,392.52 is: 32,093.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,139.66 : 102,225.93 = 21,392.52 : x
  2. Step 2: Convert to fraction form
    68,139.66/102,225.93 = 21,392.52/x
  3. Step 3: Cross multiply
    68,139.66x = 102,225.93 × 21,392.52
  4. Step 4: Simplify right side
    68,139.66x = 2,186,870,252.04
  5. Step 5: Solve for x
    x = 2,186,870,252.04/68,139.66
  6. Step 6: Final answer
    x = 32,093.94

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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.