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Finding the Fourth Proportional to 158,003.05, 218,044.16 and 86,383.05

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Solution

The fourth proportional to 158,003.05, 218,044.16 and 86,383.05 is: 119,208.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,003.05 : 218,044.16 = 86,383.05 : x
  2. Step 2: Convert to fraction form
    158,003.05/218,044.16 = 86,383.05/x
  3. Step 3: Cross multiply
    158,003.05x = 218,044.16 × 86,383.05
  4. Step 4: Simplify right side
    158,003.05x = 18,835,319,575.49
  5. Step 5: Solve for x
    x = 18,835,319,575.49/158,003.05
  6. Step 6: Final answer
    x = 119,208.59

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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.