Home / 158,072.36-218,131.80-86,438.48

Finding the Fourth Proportional to 158,072.36, 218,131.80 and 86,438.48

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Solution

The fourth proportional to 158,072.36, 218,131.80 and 86,438.48 is: 119,280.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,072.36 : 218,131.80 = 86,438.48 : x
  2. Step 2: Convert to fraction form
    158,072.36/218,131.80 = 86,438.48/x
  3. Step 3: Cross multiply
    158,072.36x = 218,131.80 × 86,438.48
  4. Step 4: Simplify right side
    158,072.36x = 18,854,981,231.66
  5. Step 5: Solve for x
    x = 18,854,981,231.66/158,072.36
  6. Step 6: Final answer
    x = 119,280.70

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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.