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Finding the Fourth Proportional to 159,138.05, 219,606.12 and 87,518.06

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Solution

The fourth proportional to 159,138.05, 219,606.12 and 87,518.06 is: 120,772.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,138.05 : 219,606.12 = 87,518.06 : x
  2. Step 2: Convert to fraction form
    159,138.05/219,606.12 = 87,518.06/x
  3. Step 3: Cross multiply
    159,138.05x = 219,606.12 × 87,518.06
  4. Step 4: Simplify right side
    159,138.05x = 19,219,502,463.74
  5. Step 5: Solve for x
    x = 19,219,502,463.74/159,138.05
  6. Step 6: Final answer
    x = 120,772.52

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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.