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Finding the Fourth Proportional to 191,830.50, 287,862.39 and 81,022.50

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Solution

The fourth proportional to 191,830.50, 287,862.39 and 81,022.50 is: 121,583.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,830.50 : 287,862.39 = 81,022.50 : x
  2. Step 2: Convert to fraction form
    191,830.50/287,862.39 = 81,022.50/x
  3. Step 3: Cross multiply
    191,830.50x = 287,862.39 × 81,022.50
  4. Step 4: Simplify right side
    191,830.50x = 23,323,330,493.78
  5. Step 5: Solve for x
    x = 23,323,330,493.78/191,830.50
  6. Step 6: Final answer
    x = 121,583.01

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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.