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Finding the Fourth Proportional to 92,451.60, 138,326.40 and 61,347.60

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Solution

The fourth proportional to 92,451.60, 138,326.40 and 61,347.60 is: 91,788.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,451.60 : 138,326.40 = 61,347.60 : x
  2. Step 2: Convert to fraction form
    92,451.60/138,326.40 = 61,347.60/x
  3. Step 3: Cross multiply
    92,451.60x = 138,326.40 × 61,347.60
  4. Step 4: Simplify right side
    92,451.60x = 8,485,992,656.64
  5. Step 5: Solve for x
    x = 8,485,992,656.64/92,451.60
  6. Step 6: Final answer
    x = 91,788.49

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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.