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Finding the Fourth Proportional to 128,683.40, 193,025.10 and 97,579.40

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Solution

The fourth proportional to 128,683.40, 193,025.10 and 97,579.40 is: 146,369.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,683.40 : 193,025.10 = 97,579.40 : x
  2. Step 2: Convert to fraction form
    128,683.40/193,025.10 = 97,579.40/x
  3. Step 3: Cross multiply
    128,683.40x = 193,025.10 × 97,579.40
  4. Step 4: Simplify right side
    128,683.40x = 18,835,273,442.94
  5. Step 5: Solve for x
    x = 18,835,273,442.94/128,683.40
  6. Step 6: Final answer
    x = 146,369.10

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1.5x scale

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.