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Finding the Fourth Proportional to 67,985,625.92, 101,978,311.24 and 21,302,685.32

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Solution

The fourth proportional to 67,985,625.92, 101,978,311.24 and 21,302,685.32 is: 31,953,987.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,985,625.92 : 101,978,311.24 = 21,302,685.32 : x
  2. Step 2: Convert to fraction form
    67,985,625.92/101,978,311.24 = 21,302,685.32/x
  3. Step 3: Cross multiply
    67,985,625.92x = 101,978,311.24 × 21,302,685.32
  4. Step 4: Simplify right side
    67,985,625.92x = 2,172,411,873,810,739
  5. Step 5: Solve for x
    x = 2,172,411,873,810,739/67,985,625.92
  6. Step 6: Final answer
    x = 31,953,987.99

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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.