Home / 91,985.23-138,016.73-39,419.47

Finding the Fourth Proportional to 91,985.23, 138,016.73 and 39,419.47

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Solution

The fourth proportional to 91,985.23, 138,016.73 and 39,419.47 is: 59,145.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,985.23 : 138,016.73 = 39,419.47 : x
  2. Step 2: Convert to fraction form
    91,985.23/138,016.73 = 39,419.47/x
  3. Step 3: Cross multiply
    91,985.23x = 138,016.73 × 39,419.47
  4. Step 4: Simplify right side
    91,985.23x = 5,440,546,347.73
  5. Step 5: Solve for x
    x = 5,440,546,347.73/91,985.23
  6. Step 6: Final answer
    x = 59,145.87

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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.