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Finding the Fourth Proportional to 54,111.20, 81,166.80 and 30,783.20

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Solution

The fourth proportional to 54,111.20, 81,166.80 and 30,783.20 is: 46,174.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,111.20 : 81,166.80 = 30,783.20 : x
  2. Step 2: Convert to fraction form
    54,111.20/81,166.80 = 30,783.20/x
  3. Step 3: Cross multiply
    54,111.20x = 81,166.80 × 30,783.20
  4. Step 4: Simplify right side
    54,111.20x = 2,498,573,837.76
  5. Step 5: Solve for x
    x = 2,498,573,837.76/54,111.20
  6. Step 6: Final answer
    x = 46,174.80

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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.