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Finding the Fourth Proportional to 191,671.16, 287,562.12 and 79,330.64

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Solution

The fourth proportional to 191,671.16, 287,562.12 and 79,330.64 is: 119,018.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,671.16 : 287,562.12 = 79,330.64 : x
  2. Step 2: Convert to fraction form
    191,671.16/287,562.12 = 79,330.64/x
  3. Step 3: Cross multiply
    191,671.16x = 287,562.12 × 79,330.64
  4. Step 4: Simplify right side
    191,671.16x = 22,812,487,019.36
  5. Step 5: Solve for x
    x = 22,812,487,019.36/191,671.16
  6. Step 6: Final answer
    x = 119,018.88

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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.