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Finding the Fourth Proportional to 61,980.85, 85,533.27 and 33,686.53

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Solution

The fourth proportional to 61,980.85, 85,533.27 and 33,686.53 is: 46,487.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,980.85 : 85,533.27 = 33,686.53 : x
  2. Step 2: Convert to fraction form
    61,980.85/85,533.27 = 33,686.53/x
  3. Step 3: Cross multiply
    61,980.85x = 85,533.27 × 33,686.53
  4. Step 4: Simplify right side
    61,980.85x = 2,881,319,206.82
  5. Step 5: Solve for x
    x = 2,881,319,206.82/61,980.85
  6. Step 6: Final answer
    x = 46,487.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.