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Finding the Fourth Proportional to 158,934.72, 219,333.78 and 87,319.38

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Solution

The fourth proportional to 158,934.72, 219,333.78 and 87,319.38 is: 120,502.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,934.72 : 219,333.78 = 87,319.38 : x
  2. Step 2: Convert to fraction form
    158,934.72/219,333.78 = 87,319.38/x
  3. Step 3: Cross multiply
    158,934.72x = 219,333.78 × 87,319.38
  4. Step 4: Simplify right side
    158,934.72x = 19,152,089,682.66
  5. Step 5: Solve for x
    x = 19,152,089,682.66/158,934.72
  6. Step 6: Final answer
    x = 120,502.87

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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.