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Finding the Fourth Proportional to 158,588.77, 218,855.51 and 86,964.52

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Solution

The fourth proportional to 158,588.77, 218,855.51 and 86,964.52 is: 120,012.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,588.77 : 218,855.51 = 86,964.52 : x
  2. Step 2: Convert to fraction form
    158,588.77/218,855.51 = 86,964.52/x
  3. Step 3: Cross multiply
    158,588.77x = 218,855.51 × 86,964.52
  4. Step 4: Simplify right side
    158,588.77x = 19,032,664,376.51
  5. Step 5: Solve for x
    x = 19,032,664,376.51/158,588.77
  6. Step 6: Final answer
    x = 120,012.69

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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.