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Finding the Fourth Proportional to 158,730.69, 219,043.42 and 87,108.87

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Solution

The fourth proportional to 158,730.69, 219,043.42 and 87,108.87 is: 120,207.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,730.69 : 219,043.42 = 87,108.87 : x
  2. Step 2: Convert to fraction form
    158,730.69/219,043.42 = 87,108.87/x
  3. Step 3: Cross multiply
    158,730.69x = 219,043.42 × 87,108.87
  4. Step 4: Simplify right side
    158,730.69x = 19,080,624,797.14
  5. Step 5: Solve for x
    x = 19,080,624,797.14/158,730.69
  6. Step 6: Final answer
    x = 120,207.53

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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.