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Finding the Fourth Proportional to 61,790.55, 86,703.60 and 61,790.55

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Solution

The fourth proportional to 61,790.55, 86,703.60 and 61,790.55 is: 86,703.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,790.55 : 86,703.60 = 61,790.55 : x
  2. Step 2: Convert to fraction form
    61,790.55/86,703.60 = 61,790.55/x
  3. Step 3: Cross multiply
    61,790.55x = 86,703.60 × 61,790.55
  4. Step 4: Simplify right side
    61,790.55x = 5,357,463,130.98
  5. Step 5: Solve for x
    x = 5,357,463,130.98/61,790.55
  6. Step 6: Final answer
    x = 86,703.60

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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.