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Finding the Fourth Proportional to 7,886,312.90, 11,070,697.90 and 7,886,312.90

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Solution

The fourth proportional to 7,886,312.90, 11,070,697.90 and 7,886,312.90 is: 11,070,697.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,886,312.90 : 11,070,697.90 = 7,886,312.90 : x
  2. Step 2: Convert to fraction form
    7,886,312.90/11,070,697.90 = 7,886,312.90/x
  3. Step 3: Cross multiply
    7,886,312.90x = 11,070,697.90 × 7,886,312.90
  4. Step 4: Simplify right side
    7,886,312.90x = 87,306,987,660,772.92
  5. Step 5: Solve for x
    x = 87,306,987,660,772.92/7,886,312.90
  6. Step 6: Final answer
    x = 11,070,697.90

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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.