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Finding the Fourth Proportional to 68,300.48, 102,450.72 and 21,557

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Solution

The fourth proportional to 68,300.48, 102,450.72 and 21,557 is: 32,335.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,300.48 : 102,450.72 = 21,557 : x
  2. Step 2: Convert to fraction form
    68,300.48/102,450.72 = 21,557/x
  3. Step 3: Cross multiply
    68,300.48x = 102,450.72 × 21,557
  4. Step 4: Simplify right side
    68,300.48x = 2,208,530,171.04
  5. Step 5: Solve for x
    x = 2,208,530,171.04/68,300.48
  6. Step 6: Final answer
    x = 32,335.50

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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.