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Finding the Fourth Proportional to 191,806.30, 287,381.40 and 121,603.60

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Solution

The fourth proportional to 191,806.30, 287,381.40 and 121,603.60 is: 182,197.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,806.30 : 287,381.40 = 121,603.60 : x
  2. Step 2: Convert to fraction form
    191,806.30/287,381.40 = 121,603.60/x
  3. Step 3: Cross multiply
    191,806.30x = 287,381.40 × 121,603.60
  4. Step 4: Simplify right side
    191,806.30x = 34,946,612,813.04
  5. Step 5: Solve for x
    x = 34,946,612,813.04/191,806.30
  6. Step 6: Final answer
    x = 182,197.42

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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.