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Finding the Fourth Proportional to 73,288.80, 109,911.60 and 28,900.80

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Solution

The fourth proportional to 73,288.80, 109,911.60 and 28,900.80 is: 43,342.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,288.80 : 109,911.60 = 28,900.80 : x
  2. Step 2: Convert to fraction form
    73,288.80/109,911.60 = 28,900.80/x
  3. Step 3: Cross multiply
    73,288.80x = 109,911.60 × 28,900.80
  4. Step 4: Simplify right side
    73,288.80x = 3,176,533,169.28
  5. Step 5: Solve for x
    x = 3,176,533,169.28/73,288.80
  6. Step 6: Final answer
    x = 43,342.68

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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.