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Finding the Fourth Proportional to 66,672.19, 100,011.94 and 19,928.71

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Solution

The fourth proportional to 66,672.19, 100,011.94 and 19,928.71 is: 29,894.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,672.19 : 100,011.94 = 19,928.71 : x
  2. Step 2: Convert to fraction form
    66,672.19/100,011.94 = 19,928.71/x
  3. Step 3: Cross multiply
    66,672.19x = 100,011.94 × 19,928.71
  4. Step 4: Simplify right side
    66,672.19x = 1,993,108,948.80
  5. Step 5: Solve for x
    x = 1,993,108,948.80/66,672.19
  6. Step 6: Final answer
    x = 29,894.16

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1.5x scale

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.