Home / 81,771.95-122,566.80-31,835.45

Finding the Fourth Proportional to 81,771.95, 122,566.80 and 31,835.45

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Solution

The fourth proportional to 81,771.95, 122,566.80 and 31,835.45 is: 47,717.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,771.95 : 122,566.80 = 31,835.45 : x
  2. Step 2: Convert to fraction form
    81,771.95/122,566.80 = 31,835.45/x
  3. Step 3: Cross multiply
    81,771.95x = 122,566.80 × 31,835.45
  4. Step 4: Simplify right side
    81,771.95x = 3,901,969,233.06
  5. Step 5: Solve for x
    x = 3,901,969,233.06/81,771.95
  6. Step 6: Final answer
    x = 47,717.70

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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.