Home / 81,850.40-122,842.56-42,419.36

Finding the Fourth Proportional to 81,850.40, 122,842.56 and 42,419.36

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Solution

The fourth proportional to 81,850.40, 122,842.56 and 42,419.36 is: 63,663.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,850.40 : 122,842.56 = 42,419.36 : x
  2. Step 2: Convert to fraction form
    81,850.40/122,842.56 = 42,419.36/x
  3. Step 3: Cross multiply
    81,850.40x = 122,842.56 × 42,419.36
  4. Step 4: Simplify right side
    81,850.40x = 5,210,902,775.96
  5. Step 5: Solve for x
    x = 5,210,902,775.96/81,850.40
  6. Step 6: Final answer
    x = 63,663.74

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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.