Home / 39,742.58-54,840.36-31,781.90

Finding the Fourth Proportional to 39,742.58, 54,840.36 and 31,781.90

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Solution

The fourth proportional to 39,742.58, 54,840.36 and 31,781.90 is: 43,855.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,742.58 : 54,840.36 = 31,781.90 : x
  2. Step 2: Convert to fraction form
    39,742.58/54,840.36 = 31,781.90/x
  3. Step 3: Cross multiply
    39,742.58x = 54,840.36 × 31,781.90
  4. Step 4: Simplify right side
    39,742.58x = 1,742,930,837.48
  5. Step 5: Solve for x
    x = 1,742,930,837.48/39,742.58
  6. Step 6: Final answer
    x = 43,855.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.