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Finding the Fourth Proportional to 158,376.36, 218,559.42 and 86,758.93

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Solution

The fourth proportional to 158,376.36, 218,559.42 and 86,758.93 is: 119,727.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,376.36 : 218,559.42 = 86,758.93 : x
  2. Step 2: Convert to fraction form
    158,376.36/218,559.42 = 86,758.93/x
  3. Step 3: Cross multiply
    158,376.36x = 218,559.42 × 86,758.93
  4. Step 4: Simplify right side
    158,376.36x = 18,961,979,894.03
  5. Step 5: Solve for x
    x = 18,961,979,894.03/158,376.36
  6. Step 6: Final answer
    x = 119,727.34

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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.