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Finding the Fourth Proportional to 191,356.84, 287,036.70 and 66,697.96

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Solution

The fourth proportional to 191,356.84, 287,036.70 and 66,697.96 is: 100,047.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,356.84 : 287,036.70 = 66,697.96 : x
  2. Step 2: Convert to fraction form
    191,356.84/287,036.70 = 66,697.96/x
  3. Step 3: Cross multiply
    191,356.84x = 287,036.70 × 66,697.96
  4. Step 4: Simplify right side
    191,356.84x = 19,144,762,335.13
  5. Step 5: Solve for x
    x = 19,144,762,335.13/191,356.84
  6. Step 6: Final answer
    x = 100,047.44

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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.