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Finding the Fourth Proportional to 10,180,915.20, 15,271,372.80 and 10,180,915.20

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Solution

The fourth proportional to 10,180,915.20, 15,271,372.80 and 10,180,915.20 is: 15,271,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,180,915.20 : 15,271,372.80 = 10,180,915.20 : x
  2. Step 2: Convert to fraction form
    10,180,915.20/15,271,372.80 = 10,180,915.20/x
  3. Step 3: Cross multiply
    10,180,915.20x = 15,271,372.80 × 10,180,915.20
  4. Step 4: Simplify right side
    10,180,915.20x = 155,476,551,464,386.56
  5. Step 5: Solve for x
    x = 155,476,551,464,386.56/10,180,915.20
  6. Step 6: Final answer
    x = 15,271,372.80

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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.