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Finding the Fourth Proportional to 7,128,452.90, 10,005,028.30 and 7,128,452.90

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Solution

The fourth proportional to 7,128,452.90, 10,005,028.30 and 7,128,452.90 is: 10,005,028.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128,452.90 : 10,005,028.30 = 7,128,452.90 : x
  2. Step 2: Convert to fraction form
    7,128,452.90/10,005,028.30 = 7,128,452.90/x
  3. Step 3: Cross multiply
    7,128,452.90x = 10,005,028.30 × 7,128,452.90
  4. Step 4: Simplify right side
    7,128,452.90x = 71,320,372,999,717.08
  5. Step 5: Solve for x
    x = 71,320,372,999,717.08/7,128,452.90
  6. Step 6: Final answer
    x = 10,005,028.30

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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.