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Finding the Fourth Proportional to 159,138.83, 219,607.20 and 87,518.85

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Solution

The fourth proportional to 159,138.83, 219,607.20 and 87,518.85 is: 120,773.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,138.83 : 219,607.20 = 87,518.85 : x
  2. Step 2: Convert to fraction form
    159,138.83/219,607.20 = 87,518.85/x
  3. Step 3: Cross multiply
    159,138.83x = 219,607.20 × 87,518.85
  4. Step 4: Simplify right side
    159,138.83x = 19,219,769,595.72
  5. Step 5: Solve for x
    x = 19,219,769,595.72/159,138.83
  6. Step 6: Final answer
    x = 120,773.60

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1.5x scale

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.