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Finding the Fourth Proportional to 191,308,118.61, 287,007,712.62 and 61,915,728.90

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Solution

The fourth proportional to 191,308,118.61, 287,007,712.62 and 61,915,728.90 is: 92,888,330.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,308,118.61 : 287,007,712.62 = 61,915,728.90 : x
  2. Step 2: Convert to fraction form
    191,308,118.61/287,007,712.62 = 61,915,728.90/x
  3. Step 3: Cross multiply
    191,308,118.61x = 287,007,712.62 × 61,915,728.90
  4. Step 4: Simplify right side
    191,308,118.61x = 17,770,291,726,192,072
  5. Step 5: Solve for x
    x = 17,770,291,726,192,072/191,308,118.61
  6. Step 6: Final answer
    x = 92,888,330.38

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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.