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Finding the Fourth Proportional to 159,036.84, 219,471.32 and 87,424.20

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Solution

The fourth proportional to 159,036.84, 219,471.32 and 87,424.20 is: 120,645.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,036.84 : 219,471.32 = 87,424.20 : x
  2. Step 2: Convert to fraction form
    159,036.84/219,471.32 = 87,424.20/x
  3. Step 3: Cross multiply
    159,036.84x = 219,471.32 × 87,424.20
  4. Step 4: Simplify right side
    159,036.84x = 19,187,104,573.94
  5. Step 5: Solve for x
    x = 19,187,104,573.94/159,036.84
  6. Step 6: Final answer
    x = 120,645.66

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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.