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Finding the Fourth Proportional to 54,139.20, 81,208.80 and 49,300.80

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Solution

The fourth proportional to 54,139.20, 81,208.80 and 49,300.80 is: 73,951.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,139.20 : 81,208.80 = 49,300.80 : x
  2. Step 2: Convert to fraction form
    54,139.20/81,208.80 = 49,300.80/x
  3. Step 3: Cross multiply
    54,139.20x = 81,208.80 × 49,300.80
  4. Step 4: Simplify right side
    54,139.20x = 4,003,658,807.04
  5. Step 5: Solve for x
    x = 4,003,658,807.04/54,139.20
  6. Step 6: Final answer
    x = 73,951.20

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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.