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Finding the Fourth Proportional to 191,503.17, 287,385.93 and 66,844.17

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Solution

The fourth proportional to 191,503.17, 287,385.93 and 66,844.17 is: 100,312.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,503.17 : 287,385.93 = 66,844.17 : x
  2. Step 2: Convert to fraction form
    191,503.17/287,385.93 = 66,844.17/x
  3. Step 3: Cross multiply
    191,503.17x = 287,385.93 × 66,844.17
  4. Step 4: Simplify right side
    191,503.17x = 19,210,073,960.53
  5. Step 5: Solve for x
    x = 19,210,073,960.53/191,503.17
  6. Step 6: Final answer
    x = 100,312.04

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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.