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Finding the Fourth Proportional to 191,801.60, 287,702.40 and 121,990.40

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Solution

The fourth proportional to 191,801.60, 287,702.40 and 121,990.40 is: 182,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,801.60 : 287,702.40 = 121,990.40 : x
  2. Step 2: Convert to fraction form
    191,801.60/287,702.40 = 121,990.40/x
  3. Step 3: Cross multiply
    191,801.60x = 287,702.40 × 121,990.40
  4. Step 4: Simplify right side
    191,801.60x = 35,096,930,856.96
  5. Step 5: Solve for x
    x = 35,096,930,856.96/191,801.60
  6. Step 6: Final answer
    x = 182,985.60

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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.