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Finding the Fourth Proportional to 191,208.60, 286,811.28 and 78,949.08

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Solution

The fourth proportional to 191,208.60, 286,811.28 and 78,949.08 is: 118,422.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,208.60 : 286,811.28 = 78,949.08 : x
  2. Step 2: Convert to fraction form
    191,208.60/286,811.28 = 78,949.08/x
  3. Step 3: Cross multiply
    191,208.60x = 286,811.28 × 78,949.08
  4. Step 4: Simplify right side
    191,208.60x = 22,643,486,689.62
  5. Step 5: Solve for x
    x = 22,643,486,689.62/191,208.60
  6. Step 6: Final answer
    x = 118,422.95

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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.