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Finding the Fourth Proportional to 39,985,889.20, 59,978,833.80 and 39,985,889.20

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Solution

The fourth proportional to 39,985,889.20, 59,978,833.80 and 39,985,889.20 is: 59,978,833.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,985,889.20 : 59,978,833.80 = 39,985,889.20 : x
  2. Step 2: Convert to fraction form
    39,985,889.20/59,978,833.80 = 39,985,889.20/x
  3. Step 3: Cross multiply
    39,985,889.20x = 59,978,833.80 × 39,985,889.20
  4. Step 4: Simplify right side
    39,985,889.20x = 2,398,307,002,672,015
  5. Step 5: Solve for x
    x = 2,398,307,002,672,015/39,985,889.20
  6. Step 6: Final answer
    x = 59,978,833.80

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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.