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Finding the Fourth Proportional to 123,660.80, 185,491.20 and 89,835.20

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Solution

The fourth proportional to 123,660.80, 185,491.20 and 89,835.20 is: 134,752.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,660.80 : 185,491.20 = 89,835.20 : x
  2. Step 2: Convert to fraction form
    123,660.80/185,491.20 = 89,835.20/x
  3. Step 3: Cross multiply
    123,660.80x = 185,491.20 × 89,835.20
  4. Step 4: Simplify right side
    123,660.80x = 16,663,639,050.24
  5. Step 5: Solve for x
    x = 16,663,639,050.24/123,660.80
  6. Step 6: Final answer
    x = 134,752.80

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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.