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Finding the Fourth Proportional to 158,383.61, 218,514.74 and 90,351.51

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Solution

The fourth proportional to 158,383.61, 218,514.74 and 90,351.51 is: 124,653.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,383.61 : 218,514.74 = 90,351.51 : x
  2. Step 2: Convert to fraction form
    158,383.61/218,514.74 = 90,351.51/x
  3. Step 3: Cross multiply
    158,383.61x = 218,514.74 × 90,351.51
  4. Step 4: Simplify right side
    158,383.61x = 19,743,136,716.26
  5. Step 5: Solve for x
    x = 19,743,136,716.26/158,383.61
  6. Step 6: Final answer
    x = 124,653.91

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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.