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Finding the Fourth Proportional to 191,678.88, 287,401.20 and 91,869.60

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Solution

The fourth proportional to 191,678.88, 287,401.20 and 91,869.60 is: 137,748.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,678.88 : 287,401.20 = 91,869.60 : x
  2. Step 2: Convert to fraction form
    191,678.88/287,401.20 = 91,869.60/x
  3. Step 3: Cross multiply
    191,678.88x = 287,401.20 × 91,869.60
  4. Step 4: Simplify right side
    191,678.88x = 26,403,433,283.52
  5. Step 5: Solve for x
    x = 26,403,433,283.52/191,678.88
  6. Step 6: Final answer
    x = 137,748.27

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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.