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Finding the Fourth Proportional to 158,559, 218,791.37 and 86,920.17

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Solution

The fourth proportional to 158,559, 218,791.37 and 86,920.17 is: 119,938.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,559 : 218,791.37 = 86,920.17 : x
  2. Step 2: Convert to fraction form
    158,559/218,791.37 = 86,920.17/x
  3. Step 3: Cross multiply
    158,559x = 218,791.37 × 86,920.17
  4. Step 4: Simplify right side
    158,559x = 19,017,382,640.33
  5. Step 5: Solve for x
    x = 19,017,382,640.33/158,559
  6. Step 6: Final answer
    x = 119,938.84

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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.