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Finding the Fourth Proportional to 134,807.96, 186,045.42 and 74,390.60

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Solution

The fourth proportional to 134,807.96, 186,045.42 and 74,390.60 is: 102,664.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,807.96 : 186,045.42 = 74,390.60 : x
  2. Step 2: Convert to fraction form
    134,807.96/186,045.42 = 74,390.60/x
  3. Step 3: Cross multiply
    134,807.96x = 186,045.42 × 74,390.60
  4. Step 4: Simplify right side
    134,807.96x = 13,840,030,421.05
  5. Step 5: Solve for x
    x = 13,840,030,421.05/134,807.96
  6. Step 6: Final answer
    x = 102,664.79

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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.