Home / 158,661.50-218,945.64-87,040

Finding the Fourth Proportional to 158,661.50, 218,945.64 and 87,040

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Solution

The fourth proportional to 158,661.50, 218,945.64 and 87,040 is: 120,111.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,661.50 : 218,945.64 = 87,040 : x
  2. Step 2: Convert to fraction form
    158,661.50/218,945.64 = 87,040/x
  3. Step 3: Cross multiply
    158,661.50x = 218,945.64 × 87,040
  4. Step 4: Simplify right side
    158,661.50x = 19,057,028,505.60
  5. Step 5: Solve for x
    x = 19,057,028,505.60/158,661.50
  6. Step 6: Final answer
    x = 120,111.23

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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.