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Finding the Fourth Proportional to 66,868.81, 100,320.59 and 19,482.80

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Solution

The fourth proportional to 66,868.81, 100,320.59 and 19,482.80 is: 29,229.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,868.81 : 100,320.59 = 19,482.80 : x
  2. Step 2: Convert to fraction form
    66,868.81/100,320.59 = 19,482.80/x
  3. Step 3: Cross multiply
    66,868.81x = 100,320.59 × 19,482.80
  4. Step 4: Simplify right side
    66,868.81x = 1,954,525,537.96
  5. Step 5: Solve for x
    x = 1,954,525,537.96/66,868.81
  6. Step 6: Final answer
    x = 29,229.26

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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.