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Finding the Fourth Proportional to 61,255,220.70, 85,821,081.90 and 61,255,220.70

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Solution

The fourth proportional to 61,255,220.70, 85,821,081.90 and 61,255,220.70 is: 85,821,081.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,255,220.70 : 85,821,081.90 = 61,255,220.70 : x
  2. Step 2: Convert to fraction form
    61,255,220.70/85,821,081.90 = 61,255,220.70/x
  3. Step 3: Cross multiply
    61,255,220.70x = 85,821,081.90 × 61,255,220.70
  4. Step 4: Simplify right side
    61,255,220.70x = 5,256,989,312,497,276
  5. Step 5: Solve for x
    x = 5,256,989,312,497,276/61,255,220.70
  6. Step 6: Final answer
    x = 85,821,081.90

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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.