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Finding the Fourth Proportional to 39,171,915.90, 54,897,369.30 and 39,171,915.90

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Solution

The fourth proportional to 39,171,915.90, 54,897,369.30 and 39,171,915.90 is: 54,897,369.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,171,915.90 : 54,897,369.30 = 39,171,915.90 : x
  2. Step 2: Convert to fraction form
    39,171,915.90/54,897,369.30 = 39,171,915.90/x
  3. Step 3: Cross multiply
    39,171,915.90x = 54,897,369.30 × 39,171,915.90
  4. Step 4: Simplify right side
    39,171,915.90x = 2,150,435,133,350,841.75
  5. Step 5: Solve for x
    x = 2,150,435,133,350,841.75/39,171,915.90
  6. Step 6: Final answer
    x = 54,897,369.30

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.