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Finding the Fourth Proportional to 191,938.88, 287,908.80 and 98,393.60

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Solution

The fourth proportional to 191,938.88, 287,908.80 and 98,393.60 is: 147,590.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,938.88 : 287,908.80 = 98,393.60 : x
  2. Step 2: Convert to fraction form
    191,938.88/287,908.80 = 98,393.60/x
  3. Step 3: Cross multiply
    191,938.88x = 287,908.80 × 98,393.60
  4. Step 4: Simplify right side
    191,938.88x = 28,328,383,303.68
  5. Step 5: Solve for x
    x = 28,328,383,303.68/191,938.88
  6. Step 6: Final answer
    x = 147,590.65

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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.