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Finding the Fourth Proportional to 66,778.71, 100,177.98 and 19,394.20

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Solution

The fourth proportional to 66,778.71, 100,177.98 and 19,394.20 is: 29,094.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,778.71 : 100,177.98 = 19,394.20 : x
  2. Step 2: Convert to fraction form
    66,778.71/100,177.98 = 19,394.20/x
  3. Step 3: Cross multiply
    66,778.71x = 100,177.98 × 19,394.20
  4. Step 4: Simplify right side
    66,778.71x = 1,942,871,779.72
  5. Step 5: Solve for x
    x = 1,942,871,779.72/66,778.71
  6. Step 6: Final answer
    x = 29,094.18

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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.