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Finding the Fourth Proportional to 66,219.40, 99,329.10 and 64,907.20

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Solution

The fourth proportional to 66,219.40, 99,329.10 and 64,907.20 is: 97,360.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,219.40 : 99,329.10 = 64,907.20 : x
  2. Step 2: Convert to fraction form
    66,219.40/99,329.10 = 64,907.20/x
  3. Step 3: Cross multiply
    66,219.40x = 99,329.10 × 64,907.20
  4. Step 4: Simplify right side
    66,219.40x = 6,447,173,759.52
  5. Step 5: Solve for x
    x = 6,447,173,759.52/66,219.40
  6. Step 6: Final answer
    x = 97,360.80

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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.