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Finding the Fourth Proportional to 68,861.16, 103,292.86 and 21,477.50

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Solution

The fourth proportional to 68,861.16, 103,292.86 and 21,477.50 is: 32,216.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,861.16 : 103,292.86 = 21,477.50 : x
  2. Step 2: Convert to fraction form
    68,861.16/103,292.86 = 21,477.50/x
  3. Step 3: Cross multiply
    68,861.16x = 103,292.86 × 21,477.50
  4. Step 4: Simplify right side
    68,861.16x = 2,218,472,400.65
  5. Step 5: Solve for x
    x = 2,218,472,400.65/68,861.16
  6. Step 6: Final answer
    x = 32,216.60

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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.