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Finding the Fourth Proportional to 61,980.93, 85,534.65 and 33,686.69

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Solution

The fourth proportional to 61,980.93, 85,534.65 and 33,686.69 is: 46,488.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,980.93 : 85,534.65 = 33,686.69 : x
  2. Step 2: Convert to fraction form
    61,980.93/85,534.65 = 33,686.69/x
  3. Step 3: Cross multiply
    61,980.93x = 85,534.65 × 33,686.69
  4. Step 4: Simplify right side
    61,980.93x = 2,881,378,811.14
  5. Step 5: Solve for x
    x = 2,881,378,811.14/61,980.93
  6. Step 6: Final answer
    x = 46,488.15

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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.