Home / 115,905.66-159,945.75-65,603.58

Finding the Fourth Proportional to 115,905.66, 159,945.75 and 65,603.58

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Solution

The fourth proportional to 115,905.66, 159,945.75 and 65,603.58 is: 90,530.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,905.66 : 159,945.75 = 65,603.58 : x
  2. Step 2: Convert to fraction form
    115,905.66/159,945.75 = 65,603.58/x
  3. Step 3: Cross multiply
    115,905.66x = 159,945.75 × 65,603.58
  4. Step 4: Simplify right side
    115,905.66x = 10,493,013,805.79
  5. Step 5: Solve for x
    x = 10,493,013,805.79/115,905.66
  6. Step 6: Final answer
    x = 90,530.64

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1.5x scale

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.