Home / 81,051.17-121,493.61-31,117.82

Finding the Fourth Proportional to 81,051.17, 121,493.61 and 31,117.82

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Solution

The fourth proportional to 81,051.17, 121,493.61 and 31,117.82 is: 46,644.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,051.17 : 121,493.61 = 31,117.82 : x
  2. Step 2: Convert to fraction form
    81,051.17/121,493.61 = 31,117.82/x
  3. Step 3: Cross multiply
    81,051.17x = 121,493.61 × 31,117.82
  4. Step 4: Simplify right side
    81,051.17x = 3,780,615,679.66
  5. Step 5: Solve for x
    x = 3,780,615,679.66/81,051.17
  6. Step 6: Final answer
    x = 46,644.80

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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.