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Finding the Fourth Proportional to 66,435.08, 99,653.79 and 19,689.08

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Solution

The fourth proportional to 66,435.08, 99,653.79 and 19,689.08 is: 29,533.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,435.08 : 99,653.79 = 19,689.08 : x
  2. Step 2: Convert to fraction form
    66,435.08/99,653.79 = 19,689.08/x
  3. Step 3: Cross multiply
    66,435.08x = 99,653.79 × 19,689.08
  4. Step 4: Simplify right side
    66,435.08x = 1,962,090,945.34
  5. Step 5: Solve for x
    x = 1,962,090,945.34/66,435.08
  6. Step 6: Final answer
    x = 29,533.96

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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.