Home / 90,284.64-135,450-57,239.52

Finding the Fourth Proportional to 90,284.64, 135,450 and 57,239.52

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Solution

The fourth proportional to 90,284.64, 135,450 and 57,239.52 is: 85,873.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,284.64 : 135,450 = 57,239.52 : x
  2. Step 2: Convert to fraction form
    90,284.64/135,450 = 57,239.52/x
  3. Step 3: Cross multiply
    90,284.64x = 135,450 × 57,239.52
  4. Step 4: Simplify right side
    90,284.64x = 7,753,092,984
  5. Step 5: Solve for x
    x = 7,753,092,984/90,284.64
  6. Step 6: Final answer
    x = 85,873.89

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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.