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Finding the Fourth Proportional to 191,818,974.30, 287,728,461.45 and 70,634,679.90

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Solution

The fourth proportional to 191,818,974.30, 287,728,461.45 and 70,634,679.90 is: 105,952,019.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,818,974.30 : 287,728,461.45 = 70,634,679.90 : x
  2. Step 2: Convert to fraction form
    191,818,974.30/287,728,461.45 = 70,634,679.90/x
  3. Step 3: Cross multiply
    191,818,974.30x = 287,728,461.45 × 70,634,679.90
  4. Step 4: Simplify right side
    191,818,974.30x = 20,323,607,772,640,240
  5. Step 5: Solve for x
    x = 20,323,607,772,640,240/191,818,974.30
  6. Step 6: Final answer
    x = 105,952,019.85

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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.