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Finding the Fourth Proportional to 99,927.20, 149,890.80 and 84,180.80

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Solution

The fourth proportional to 99,927.20, 149,890.80 and 84,180.80 is: 126,271.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,927.20 : 149,890.80 = 84,180.80 : x
  2. Step 2: Convert to fraction form
    99,927.20/149,890.80 = 84,180.80/x
  3. Step 3: Cross multiply
    99,927.20x = 149,890.80 × 84,180.80
  4. Step 4: Simplify right side
    99,927.20x = 12,617,927,456.64
  5. Step 5: Solve for x
    x = 12,617,927,456.64/99,927.20
  6. Step 6: Final answer
    x = 126,271.20

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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.