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Finding the Fourth Proportional to 158,995.85, 219,411.78 and 87,374.33

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Solution

The fourth proportional to 158,995.85, 219,411.78 and 87,374.33 is: 120,575.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,995.85 : 219,411.78 = 87,374.33 : x
  2. Step 2: Convert to fraction form
    158,995.85/219,411.78 = 87,374.33/x
  3. Step 3: Cross multiply
    158,995.85x = 219,411.78 × 87,374.33
  4. Step 4: Simplify right side
    158,995.85x = 19,170,956,174.55
  5. Step 5: Solve for x
    x = 19,170,956,174.55/158,995.85
  6. Step 6: Final answer
    x = 120,575.20

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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.