Home / 81,985.40-122,973.24-28,673.66

Finding the Fourth Proportional to 81,985.40, 122,973.24 and 28,673.66

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Solution

The fourth proportional to 81,985.40, 122,973.24 and 28,673.66 is: 43,008.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,985.40 : 122,973.24 = 28,673.66 : x
  2. Step 2: Convert to fraction form
    81,985.40/122,973.24 = 28,673.66/x
  3. Step 3: Cross multiply
    81,985.40x = 122,973.24 × 28,673.66
  4. Step 4: Simplify right side
    81,985.40x = 3,526,092,872.86
  5. Step 5: Solve for x
    x = 3,526,092,872.86/81,985.40
  6. Step 6: Final answer
    x = 43,008.79

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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.