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Finding the Fourth Proportional to 61,918.66, 85,448.09 and 35,066.40

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Solution

The fourth proportional to 61,918.66, 85,448.09 and 35,066.40 is: 48,391.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,918.66 : 85,448.09 = 35,066.40 : x
  2. Step 2: Convert to fraction form
    61,918.66/85,448.09 = 35,066.40/x
  3. Step 3: Cross multiply
    61,918.66x = 85,448.09 × 35,066.40
  4. Step 4: Simplify right side
    61,918.66x = 2,996,356,300.60
  5. Step 5: Solve for x
    x = 2,996,356,300.60/61,918.66
  6. Step 6: Final answer
    x = 48,391.81

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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.