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Finding the Fourth Proportional to 191,739,318.70, 287,608,978.05 and 133,068,232.30

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Solution

The fourth proportional to 191,739,318.70, 287,608,978.05 and 133,068,232.30 is: 199,602,348.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,739,318.70 : 287,608,978.05 = 133,068,232.30 : x
  2. Step 2: Convert to fraction form
    191,739,318.70/287,608,978.05 = 133,068,232.30/x
  3. Step 3: Cross multiply
    191,739,318.70x = 287,608,978.05 × 133,068,232.30
  4. Step 4: Simplify right side
    191,739,318.70x = 38,271,618,302,723,000
  5. Step 5: Solve for x
    x = 38,271,618,302,723,000/191,739,318.70
  6. Step 6: Final answer
    x = 199,602,348.45

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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.