Home / 75,840.36-113,790-31,455.72

Finding the Fourth Proportional to 75,840.36, 113,790 and 31,455.72

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Solution

The fourth proportional to 75,840.36, 113,790 and 31,455.72 is: 47,195.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,840.36 : 113,790 = 31,455.72 : x
  2. Step 2: Convert to fraction form
    75,840.36/113,790 = 31,455.72/x
  3. Step 3: Cross multiply
    75,840.36x = 113,790 × 31,455.72
  4. Step 4: Simplify right side
    75,840.36x = 3,579,346,378.80
  5. Step 5: Solve for x
    x = 3,579,346,378.80/75,840.36
  6. Step 6: Final answer
    x = 47,195.80

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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.