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Finding the Fourth Proportional to 67,985,541, 101,978,184.06 and 21,302,600.78

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Solution

The fourth proportional to 67,985,541, 101,978,184.06 and 21,302,600.78 is: 31,953,861.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,985,541 : 101,978,184.06 = 21,302,600.78 : x
  2. Step 2: Convert to fraction form
    67,985,541/101,978,184.06 = 21,302,600.78/x
  3. Step 3: Cross multiply
    67,985,541x = 101,978,184.06 × 21,302,600.78
  4. Step 4: Simplify right side
    67,985,541x = 2,172,400,543,299,539.75
  5. Step 5: Solve for x
    x = 2,172,400,543,299,539.75/67,985,541
  6. Step 6: Final answer
    x = 31,953,861.24

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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.