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Finding the Fourth Proportional to 66,958.50, 100,438.32 and 17,038.65

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Solution

The fourth proportional to 66,958.50, 100,438.32 and 17,038.65 is: 25,558.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,958.50 : 100,438.32 = 17,038.65 : x
  2. Step 2: Convert to fraction form
    66,958.50/100,438.32 = 17,038.65/x
  3. Step 3: Cross multiply
    66,958.50x = 100,438.32 × 17,038.65
  4. Step 4: Simplify right side
    66,958.50x = 1,711,333,381.07
  5. Step 5: Solve for x
    x = 1,711,333,381.07/66,958.50
  6. Step 6: Final answer
    x = 25,558.12

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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.