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Finding the Fourth Proportional to 68,279.16, 102,418.74 and 21,535.68

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Solution

The fourth proportional to 68,279.16, 102,418.74 and 21,535.68 is: 32,303.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,279.16 : 102,418.74 = 21,535.68 : x
  2. Step 2: Convert to fraction form
    68,279.16/102,418.74 = 21,535.68/x
  3. Step 3: Cross multiply
    68,279.16x = 102,418.74 × 21,535.68
  4. Step 4: Simplify right side
    68,279.16x = 2,205,657,210.64
  5. Step 5: Solve for x
    x = 2,205,657,210.64/68,279.16
  6. Step 6: Final answer
    x = 32,303.52

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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.