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Finding the Fourth Proportional to 61,603.64, 85,026.20 and 38,928.20

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Solution

The fourth proportional to 61,603.64, 85,026.20 and 38,928.20 is: 53,729.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,603.64 : 85,026.20 = 38,928.20 : x
  2. Step 2: Convert to fraction form
    61,603.64/85,026.20 = 38,928.20/x
  3. Step 3: Cross multiply
    61,603.64x = 85,026.20 × 38,928.20
  4. Step 4: Simplify right side
    61,603.64x = 3,309,916,918.84
  5. Step 5: Solve for x
    x = 3,309,916,918.84/61,603.64
  6. Step 6: Final answer
    x = 53,729.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.