Home / 81,941.64-113,079.12-45,643.51

Finding the Fourth Proportional to 81,941.64, 113,079.12 and 45,643.51

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Solution

The fourth proportional to 81,941.64, 113,079.12 and 45,643.51 is: 62,987.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,941.64 : 113,079.12 = 45,643.51 : x
  2. Step 2: Convert to fraction form
    81,941.64/113,079.12 = 45,643.51/x
  3. Step 3: Cross multiply
    81,941.64x = 113,079.12 × 45,643.51
  4. Step 4: Simplify right side
    81,941.64x = 5,161,328,351.93
  5. Step 5: Solve for x
    x = 5,161,328,351.93/81,941.64
  6. Step 6: Final answer
    x = 62,987.86

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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.