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Finding the Fourth Proportional to 66,130.80, 99,186.60 and 19,378.80

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Solution

The fourth proportional to 66,130.80, 99,186.60 and 19,378.80 is: 29,065.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,130.80 : 99,186.60 = 19,378.80 : x
  2. Step 2: Convert to fraction form
    66,130.80/99,186.60 = 19,378.80/x
  3. Step 3: Cross multiply
    66,130.80x = 99,186.60 × 19,378.80
  4. Step 4: Simplify right side
    66,130.80x = 1,922,117,284.08
  5. Step 5: Solve for x
    x = 1,922,117,284.08/66,130.80
  6. Step 6: Final answer
    x = 29,065.39

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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.