Home / 85,548.20-128,322.30-23,218.70

Finding the Fourth Proportional to 85,548.20, 128,322.30 and 23,218.70

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Solution

The fourth proportional to 85,548.20, 128,322.30 and 23,218.70 is: 34,828.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,548.20 : 128,322.30 = 23,218.70 : x
  2. Step 2: Convert to fraction form
    85,548.20/128,322.30 = 23,218.70/x
  3. Step 3: Cross multiply
    85,548.20x = 128,322.30 × 23,218.70
  4. Step 4: Simplify right side
    85,548.20x = 2,979,476,987.01
  5. Step 5: Solve for x
    x = 2,979,476,987.01/85,548.20
  6. Step 6: Final answer
    x = 34,828.05

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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.