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Finding the Fourth Proportional to 191,854.08, 287,988.48 and 81,123.84

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Solution

The fourth proportional to 191,854.08, 287,988.48 and 81,123.84 is: 121,773.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,854.08 : 287,988.48 = 81,123.84 : x
  2. Step 2: Convert to fraction form
    191,854.08/287,988.48 = 81,123.84/x
  3. Step 3: Cross multiply
    191,854.08x = 287,988.48 × 81,123.84
  4. Step 4: Simplify right side
    191,854.08x = 23,362,731,373.36
  5. Step 5: Solve for x
    x = 23,362,731,373.36/191,854.08
  6. Step 6: Final answer
    x = 121,773.44

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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.