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Finding the Fourth Proportional to 65,606.85, 90,534.85 and 38,758.01

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Solution

The fourth proportional to 65,606.85, 90,534.85 and 38,758.01 is: 53,484.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,606.85 : 90,534.85 = 38,758.01 : x
  2. Step 2: Convert to fraction form
    65,606.85/90,534.85 = 38,758.01/x
  3. Step 3: Cross multiply
    65,606.85x = 90,534.85 × 38,758.01
  4. Step 4: Simplify right side
    65,606.85x = 3,508,950,072.08
  5. Step 5: Solve for x
    x = 3,508,950,072.08/65,606.85
  6. Step 6: Final answer
    x = 53,484.51

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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.