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Finding the Fourth Proportional to 154,671.48, 213,439.50 and 87,603.96

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Solution

The fourth proportional to 154,671.48, 213,439.50 and 87,603.96 is: 120,889.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,671.48 : 213,439.50 = 87,603.96 : x
  2. Step 2: Convert to fraction form
    154,671.48/213,439.50 = 87,603.96/x
  3. Step 3: Cross multiply
    154,671.48x = 213,439.50 × 87,603.96
  4. Step 4: Simplify right side
    154,671.48x = 18,698,145,420.42
  5. Step 5: Solve for x
    x = 18,698,145,420.42/154,671.48
  6. Step 6: Final answer
    x = 120,889.42

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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.