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Finding the Fourth Proportional to 158,816.68, 219,169.76 and 87,199.72

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Solution

The fourth proportional to 158,816.68, 219,169.76 and 87,199.72 is: 120,337.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,816.68 : 219,169.76 = 87,199.72 : x
  2. Step 2: Convert to fraction form
    158,816.68/219,169.76 = 87,199.72/x
  3. Step 3: Cross multiply
    158,816.68x = 219,169.76 × 87,199.72
  4. Step 4: Simplify right side
    158,816.68x = 19,111,541,704.47
  5. Step 5: Solve for x
    x = 19,111,541,704.47/158,816.68
  6. Step 6: Final answer
    x = 120,337.12

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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.