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Finding the Fourth Proportional to 116,905.60, 175,358.40 and 74,915.20

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Solution

The fourth proportional to 116,905.60, 175,358.40 and 74,915.20 is: 112,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,905.60 : 175,358.40 = 74,915.20 : x
  2. Step 2: Convert to fraction form
    116,905.60/175,358.40 = 74,915.20/x
  3. Step 3: Cross multiply
    116,905.60x = 175,358.40 × 74,915.20
  4. Step 4: Simplify right side
    116,905.60x = 13,137,009,607.68
  5. Step 5: Solve for x
    x = 13,137,009,607.68/116,905.60
  6. Step 6: Final answer
    x = 112,372.80

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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.