Home / 115,938.87-159,915.61-81,556.50

Finding the Fourth Proportional to 115,938.87, 159,915.61 and 81,556.50

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Solution

The fourth proportional to 115,938.87, 159,915.61 and 81,556.50 is: 112,491.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,938.87 : 159,915.61 = 81,556.50 : x
  2. Step 2: Convert to fraction form
    115,938.87/159,915.61 = 81,556.50/x
  3. Step 3: Cross multiply
    115,938.87x = 159,915.61 × 81,556.50
  4. Step 4: Simplify right side
    115,938.87x = 13,042,157,446.97
  5. Step 5: Solve for x
    x = 13,042,157,446.97/115,938.87
  6. Step 6: Final answer
    x = 112,491.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.