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Finding the Fourth Proportional to 48,739.20, 73,108.80 and 21,037.20

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Solution

The fourth proportional to 48,739.20, 73,108.80 and 21,037.20 is: 31,555.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,739.20 : 73,108.80 = 21,037.20 : x
  2. Step 2: Convert to fraction form
    48,739.20/73,108.80 = 21,037.20/x
  3. Step 3: Cross multiply
    48,739.20x = 73,108.80 × 21,037.20
  4. Step 4: Simplify right side
    48,739.20x = 1,538,004,447.36
  5. Step 5: Solve for x
    x = 1,538,004,447.36/48,739.20
  6. Step 6: Final answer
    x = 31,555.80

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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.