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Finding the Fourth Proportional to 191,709.60, 287,564.40 and 121,898.40

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Solution

The fourth proportional to 191,709.60, 287,564.40 and 121,898.40 is: 182,847.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,709.60 : 287,564.40 = 121,898.40 : x
  2. Step 2: Convert to fraction form
    191,709.60/287,564.40 = 121,898.40/x
  3. Step 3: Cross multiply
    191,709.60x = 287,564.40 × 121,898.40
  4. Step 4: Simplify right side
    191,709.60x = 35,053,640,256.96
  5. Step 5: Solve for x
    x = 35,053,640,256.96/191,709.60
  6. Step 6: Final answer
    x = 182,847.60

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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.