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Finding the Fourth Proportional to 66,434.88, 99,652.68 and 19,688.16

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Solution

The fourth proportional to 66,434.88, 99,652.68 and 19,688.16 is: 29,532.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,434.88 : 99,652.68 = 19,688.16 : x
  2. Step 2: Convert to fraction form
    66,434.88/99,652.68 = 19,688.16/x
  3. Step 3: Cross multiply
    66,434.88x = 99,652.68 × 19,688.16
  4. Step 4: Simplify right side
    66,434.88x = 1,961,977,908.27
  5. Step 5: Solve for x
    x = 1,961,977,908.27/66,434.88
  6. Step 6: Final answer
    x = 29,532.35

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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.