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Finding the Fourth Proportional to 66,534.10, 99,801.15 and 19,780.90

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Solution

The fourth proportional to 66,534.10, 99,801.15 and 19,780.90 is: 29,671.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,534.10 : 99,801.15 = 19,780.90 : x
  2. Step 2: Convert to fraction form
    66,534.10/99,801.15 = 19,780.90/x
  3. Step 3: Cross multiply
    66,534.10x = 99,801.15 × 19,780.90
  4. Step 4: Simplify right side
    66,534.10x = 1,974,156,568.04
  5. Step 5: Solve for x
    x = 1,974,156,568.04/66,534.10
  6. Step 6: Final answer
    x = 29,671.35

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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.