Home / 53,940.80-81,008.40-52,191.20

Finding the Fourth Proportional to 53,940.80, 81,008.40 and 52,191.20

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Solution

The fourth proportional to 53,940.80, 81,008.40 and 52,191.20 is: 78,380.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,940.80 : 81,008.40 = 52,191.20 : x
  2. Step 2: Convert to fraction form
    53,940.80/81,008.40 = 52,191.20/x
  3. Step 3: Cross multiply
    53,940.80x = 81,008.40 × 52,191.20
  4. Step 4: Simplify right side
    53,940.80x = 4,227,925,606.08
  5. Step 5: Solve for x
    x = 4,227,925,606.08/53,940.80
  6. Step 6: Final answer
    x = 78,380.85

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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.