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Finding the Fourth Proportional to 13,830,129.90, 20,745,194.85 and 13,830,129.90

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Solution

The fourth proportional to 13,830,129.90, 20,745,194.85 and 13,830,129.90 is: 20,745,194.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,830,129.90 : 20,745,194.85 = 13,830,129.90 : x
  2. Step 2: Convert to fraction form
    13,830,129.90/20,745,194.85 = 13,830,129.90/x
  3. Step 3: Cross multiply
    13,830,129.90x = 20,745,194.85 × 13,830,129.90
  4. Step 4: Simplify right side
    13,830,129.90x = 286,908,739,576,311.06
  5. Step 5: Solve for x
    x = 286,908,739,576,311.06/13,830,129.90
  6. Step 6: Final answer
    x = 20,745,194.85

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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.