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Finding the Fourth Proportional to 171,583,907.11, 257,377,656.74 and 67,978,327.78

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Solution

The fourth proportional to 171,583,907.11, 257,377,656.74 and 67,978,327.78 is: 101,968,203.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,583,907.11 : 257,377,656.74 = 67,978,327.78 : x
  2. Step 2: Convert to fraction form
    171,583,907.11/257,377,656.74 = 67,978,327.78/x
  3. Step 3: Cross multiply
    171,583,907.11x = 257,377,656.74 × 67,978,327.78
  4. Step 4: Simplify right side
    171,583,907.11x = 17,496,102,713,101,878
  5. Step 5: Solve for x
    x = 17,496,102,713,101,878/171,583,907.11
  6. Step 6: Final answer
    x = 101,968,203.24

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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.