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Finding the Fourth Proportional to 128,883.13, 193,066 and 65,700.70

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Solution

The fourth proportional to 128,883.13, 193,066 and 65,700.70 is: 98,419.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,883.13 : 193,066 = 65,700.70 : x
  2. Step 2: Convert to fraction form
    128,883.13/193,066 = 65,700.70/x
  3. Step 3: Cross multiply
    128,883.13x = 193,066 × 65,700.70
  4. Step 4: Simplify right side
    128,883.13x = 12,684,571,346.20
  5. Step 5: Solve for x
    x = 12,684,571,346.20/128,883.13
  6. Step 6: Final answer
    x = 98,419.18

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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.