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Finding the Fourth Proportional to 66,259.68, 99,355.20 and 19,506.40

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Solution

The fourth proportional to 66,259.68, 99,355.20 and 19,506.40 is: 29,249.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,259.68 : 99,355.20 = 19,506.40 : x
  2. Step 2: Convert to fraction form
    66,259.68/99,355.20 = 19,506.40/x
  3. Step 3: Cross multiply
    66,259.68x = 99,355.20 × 19,506.40
  4. Step 4: Simplify right side
    66,259.68x = 1,938,062,273.28
  5. Step 5: Solve for x
    x = 1,938,062,273.28/66,259.68
  6. Step 6: Final answer
    x = 29,249.50

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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.