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Finding the Fourth Proportional to 93,918.40, 141,007.20 and 74,219.20

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Solution

The fourth proportional to 93,918.40, 141,007.20 and 74,219.20 is: 111,431.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,918.40 : 141,007.20 = 74,219.20 : x
  2. Step 2: Convert to fraction form
    93,918.40/141,007.20 = 74,219.20/x
  3. Step 3: Cross multiply
    93,918.40x = 141,007.20 × 74,219.20
  4. Step 4: Simplify right side
    93,918.40x = 10,465,441,578.24
  5. Step 5: Solve for x
    x = 10,465,441,578.24/93,918.40
  6. Step 6: Final answer
    x = 111,431.22

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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.