Home / 81,811.23-122,807.96-42,357.75

Finding the Fourth Proportional to 81,811.23, 122,807.96 and 42,357.75

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Solution

The fourth proportional to 81,811.23, 122,807.96 and 42,357.75 is: 63,583.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,811.23 : 122,807.96 = 42,357.75 : x
  2. Step 2: Convert to fraction form
    81,811.23/122,807.96 = 42,357.75/x
  3. Step 3: Cross multiply
    81,811.23x = 122,807.96 × 42,357.75
  4. Step 4: Simplify right side
    81,811.23x = 5,201,868,867.69
  5. Step 5: Solve for x
    x = 5,201,868,867.69/81,811.23
  6. Step 6: Final answer
    x = 63,583.80

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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.