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Finding the Fourth Proportional to 60,855.20, 91,282.80 and 21,456.80

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Solution

The fourth proportional to 60,855.20, 91,282.80 and 21,456.80 is: 32,185.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,855.20 : 91,282.80 = 21,456.80 : x
  2. Step 2: Convert to fraction form
    60,855.20/91,282.80 = 21,456.80/x
  3. Step 3: Cross multiply
    60,855.20x = 91,282.80 × 21,456.80
  4. Step 4: Simplify right side
    60,855.20x = 1,958,636,783.04
  5. Step 5: Solve for x
    x = 1,958,636,783.04/60,855.20
  6. Step 6: Final answer
    x = 32,185.20

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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.