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Finding the Fourth Proportional to 158,360.87, 218,538.09 and 86,742.09

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Solution

The fourth proportional to 158,360.87, 218,538.09 and 86,742.09 is: 119,704.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,360.87 : 218,538.09 = 86,742.09 : x
  2. Step 2: Convert to fraction form
    158,360.87/218,538.09 = 86,742.09/x
  3. Step 3: Cross multiply
    158,360.87x = 218,538.09 × 86,742.09
  4. Step 4: Simplify right side
    158,360.87x = 18,956,450,671.21
  5. Step 5: Solve for x
    x = 18,956,450,671.21/158,360.87
  6. Step 6: Final answer
    x = 119,704.13

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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.