Home / 81,343.06-122,031.70-28,040.00

Finding the Fourth Proportional to 81,343.06, 122,031.70 and 28,040.00

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Solution

The fourth proportional to 81,343.06, 122,031.70 and 28,040.00 is: 42,065.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,343.06 : 122,031.70 = 28,040.00 : x
  2. Step 2: Convert to fraction form
    81,343.06/122,031.70 = 28,040.00/x
  3. Step 3: Cross multiply
    81,343.06x = 122,031.70 × 28,040.00
  4. Step 4: Simplify right side
    81,343.06x = 3,421,768,187.74
  5. Step 5: Solve for x
    x = 3,421,768,187.74/81,343.06
  6. Step 6: Final answer
    x = 42,065.89

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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.