Home / 81,001.07-121,518.89-31,080.75

Finding the Fourth Proportional to 81,001.07, 121,518.89 and 31,080.75

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Solution

The fourth proportional to 81,001.07, 121,518.89 and 31,080.75 is: 46,627.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,001.07 : 121,518.89 = 31,080.75 : x
  2. Step 2: Convert to fraction form
    81,001.07/121,518.89 = 31,080.75/x
  3. Step 3: Cross multiply
    81,001.07x = 121,518.89 × 31,080.75
  4. Step 4: Simplify right side
    81,001.07x = 3,776,898,084.96
  5. Step 5: Solve for x
    x = 3,776,898,084.96/81,001.07
  6. Step 6: Final answer
    x = 46,627.76

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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.