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Finding the Fourth Proportional to 101,434.11, 139,931.91 and 65,635.68

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Solution

The fourth proportional to 101,434.11, 139,931.91 and 65,635.68 is: 90,546.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,434.11 : 139,931.91 = 65,635.68 : x
  2. Step 2: Convert to fraction form
    101,434.11/139,931.91 = 65,635.68/x
  3. Step 3: Cross multiply
    101,434.11x = 139,931.91 × 65,635.68
  4. Step 4: Simplify right side
    101,434.11x = 9,184,526,066.55
  5. Step 5: Solve for x
    x = 9,184,526,066.55/101,434.11
  6. Step 6: Final answer
    x = 90,546.72

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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.