Home / 66,078.54-91,216.80-40,589.06

Finding the Fourth Proportional to 66,078.54, 91,216.80 and 40,589.06

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Solution

The fourth proportional to 66,078.54, 91,216.80 and 40,589.06 is: 56,030.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,078.54 : 91,216.80 = 40,589.06 : x
  2. Step 2: Convert to fraction form
    66,078.54/91,216.80 = 40,589.06/x
  3. Step 3: Cross multiply
    66,078.54x = 91,216.80 × 40,589.06
  4. Step 4: Simplify right side
    66,078.54x = 3,702,403,712.12
  5. Step 5: Solve for x
    x = 3,702,403,712.12/66,078.54
  6. Step 6: Final answer
    x = 56,030.35

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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.