Home / 115,971.40-159,973.14-65,660.68

Finding the Fourth Proportional to 115,971.40, 159,973.14 and 65,660.68

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Solution

The fourth proportional to 115,971.40, 159,973.14 and 65,660.68 is: 90,573.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,971.40 : 159,973.14 = 65,660.68 : x
  2. Step 2: Convert to fraction form
    115,971.40/159,973.14 = 65,660.68/x
  3. Step 3: Cross multiply
    115,971.40x = 159,973.14 × 65,660.68
  4. Step 4: Simplify right side
    115,971.40x = 10,503,945,154.14
  5. Step 5: Solve for x
    x = 10,503,945,154.14/115,971.40
  6. Step 6: Final answer
    x = 90,573.58

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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.