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Finding the Fourth Proportional to 66,995.70, 100,362.18 and 38,856.65

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Solution

The fourth proportional to 66,995.70, 100,362.18 and 38,856.65 is: 58,208.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,995.70 : 100,362.18 = 38,856.65 : x
  2. Step 2: Convert to fraction form
    66,995.70/100,362.18 = 38,856.65/x
  3. Step 3: Cross multiply
    66,995.70x = 100,362.18 × 38,856.65
  4. Step 4: Simplify right side
    66,995.70x = 3,899,737,526.83
  5. Step 5: Solve for x
    x = 3,899,737,526.83/66,995.70
  6. Step 6: Final answer
    x = 58,208.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.