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Finding the Fourth Proportional to 66,884.90, 100,335.64 and 21,890.80

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Solution

The fourth proportional to 66,884.90, 100,335.64 and 21,890.80 is: 32,838.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,884.90 : 100,335.64 = 21,890.80 : x
  2. Step 2: Convert to fraction form
    66,884.90/100,335.64 = 21,890.80/x
  3. Step 3: Cross multiply
    66,884.90x = 100,335.64 × 21,890.80
  4. Step 4: Simplify right side
    66,884.90x = 2,196,427,428.11
  5. Step 5: Solve for x
    x = 2,196,427,428.11/66,884.90
  6. Step 6: Final answer
    x = 32,838.91

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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.