Home / 81,216.85-112,080.64-45,403.01

Finding the Fourth Proportional to 81,216.85, 112,080.64 and 45,403.01

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Solution

The fourth proportional to 81,216.85, 112,080.64 and 45,403.01 is: 62,656.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,216.85 : 112,080.64 = 45,403.01 : x
  2. Step 2: Convert to fraction form
    81,216.85/112,080.64 = 45,403.01/x
  3. Step 3: Cross multiply
    81,216.85x = 112,080.64 × 45,403.01
  4. Step 4: Simplify right side
    81,216.85x = 5,088,798,418.73
  5. Step 5: Solve for x
    x = 5,088,798,418.73/81,216.85
  6. Step 6: Final answer
    x = 62,656.93

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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.