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Finding the Fourth Proportional to 66,801.20, 100,201.80 and 66,340.40

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Solution

The fourth proportional to 66,801.20, 100,201.80 and 66,340.40 is: 99,510.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,801.20 : 100,201.80 = 66,340.40 : x
  2. Step 2: Convert to fraction form
    66,801.20/100,201.80 = 66,340.40/x
  3. Step 3: Cross multiply
    66,801.20x = 100,201.80 × 66,340.40
  4. Step 4: Simplify right side
    66,801.20x = 6,647,427,492.72
  5. Step 5: Solve for x
    x = 6,647,427,492.72/66,801.20
  6. Step 6: Final answer
    x = 99,510.60

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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.