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Finding the Fourth Proportional to 39,985,890.20, 59,978,835.30 and 39,985,890.20

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Solution

The fourth proportional to 39,985,890.20, 59,978,835.30 and 39,985,890.20 is: 59,978,835.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,985,890.20 : 59,978,835.30 = 39,985,890.20 : x
  2. Step 2: Convert to fraction form
    39,985,890.20/59,978,835.30 = 39,985,890.20/x
  3. Step 3: Cross multiply
    39,985,890.20x = 59,978,835.30 × 39,985,890.20
  4. Step 4: Simplify right side
    39,985,890.20x = 2,398,307,122,629,684
  5. Step 5: Solve for x
    x = 2,398,307,122,629,684/39,985,890.20
  6. Step 6: Final answer
    x = 59,978,835.30

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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.