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Finding the Fourth Proportional to 159,138.71, 219,607.04 and 87,518.73

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Solution

The fourth proportional to 159,138.71, 219,607.04 and 87,518.73 is: 120,773.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,138.71 : 219,607.04 = 87,518.73 : x
  2. Step 2: Convert to fraction form
    159,138.71/219,607.04 = 87,518.73/x
  3. Step 3: Cross multiply
    159,138.71x = 219,607.04 × 87,518.73
  4. Step 4: Simplify right side
    159,138.71x = 19,219,728,802.27
  5. Step 5: Solve for x
    x = 19,219,728,802.27/159,138.71
  6. Step 6: Final answer
    x = 120,773.44

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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.