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Finding the Fourth Proportional to 159,051.12, 219,491 and 91,069.12

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Solution

The fourth proportional to 159,051.12, 219,491 and 91,069.12 is: 125,675.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,051.12 : 219,491 = 91,069.12 : x
  2. Step 2: Convert to fraction form
    159,051.12/219,491 = 91,069.12/x
  3. Step 3: Cross multiply
    159,051.12x = 219,491 × 91,069.12
  4. Step 4: Simplify right side
    159,051.12x = 19,988,852,217.92
  5. Step 5: Solve for x
    x = 19,988,852,217.92/159,051.12
  6. Step 6: Final answer
    x = 125,675.65

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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.