Home / 81,870.48-122,729.04-74,566.44

Finding the Fourth Proportional to 81,870.48, 122,729.04 and 74,566.44

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Solution

The fourth proportional to 81,870.48, 122,729.04 and 74,566.44 is: 111,779.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,870.48 : 122,729.04 = 74,566.44 : x
  2. Step 2: Convert to fraction form
    81,870.48/122,729.04 = 74,566.44/x
  3. Step 3: Cross multiply
    81,870.48x = 122,729.04 × 74,566.44
  4. Step 4: Simplify right side
    81,870.48x = 9,151,467,597.42
  5. Step 5: Solve for x
    x = 9,151,467,597.42/81,870.48
  6. Step 6: Final answer
    x = 111,779.82

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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.