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Finding the Fourth Proportional to 158,989.96, 219,406.62 and 87,377.32

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Solution

The fourth proportional to 158,989.96, 219,406.62 and 87,377.32 is: 120,580.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,989.96 : 219,406.62 = 87,377.32 : x
  2. Step 2: Convert to fraction form
    158,989.96/219,406.62 = 87,377.32/x
  3. Step 3: Cross multiply
    158,989.96x = 219,406.62 × 87,377.32
  4. Step 4: Simplify right side
    158,989.96x = 19,171,162,445.86
  5. Step 5: Solve for x
    x = 19,171,162,445.86/158,989.96
  6. Step 6: Final answer
    x = 120,580.96

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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.