Home / 81,973.76-122,878.54-31,985.08

Finding the Fourth Proportional to 81,973.76, 122,878.54 and 31,985.08

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Solution

The fourth proportional to 81,973.76, 122,878.54 and 31,985.08 is: 47,945.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,973.76 : 122,878.54 = 31,985.08 : x
  2. Step 2: Convert to fraction form
    81,973.76/122,878.54 = 31,985.08/x
  3. Step 3: Cross multiply
    81,973.76x = 122,878.54 × 31,985.08
  4. Step 4: Simplify right side
    81,973.76x = 3,930,279,932.18
  5. Step 5: Solve for x
    x = 3,930,279,932.18/81,973.76
  6. Step 6: Final answer
    x = 47,945.59

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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.