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Finding the Fourth Proportional to 158,675.36, 218,976.72 and 87,059.84

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Solution

The fourth proportional to 158,675.36, 218,976.72 and 87,059.84 is: 120,145.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,675.36 : 218,976.72 = 87,059.84 : x
  2. Step 2: Convert to fraction form
    158,675.36/218,976.72 = 87,059.84/x
  3. Step 3: Cross multiply
    158,675.36x = 218,976.72 × 87,059.84
  4. Step 4: Simplify right side
    158,675.36x = 19,064,078,206.92
  5. Step 5: Solve for x
    x = 19,064,078,206.92/158,675.36
  6. Step 6: Final answer
    x = 120,145.17

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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.