Home / 82,128.51-113,406.41-55,359.63

Finding the Fourth Proportional to 82,128.51, 113,406.41 and 55,359.63

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Solution

The fourth proportional to 82,128.51, 113,406.41 and 55,359.63 is: 76,442.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,128.51 : 113,406.41 = 55,359.63 : x
  2. Step 2: Convert to fraction form
    82,128.51/113,406.41 = 55,359.63/x
  3. Step 3: Cross multiply
    82,128.51x = 113,406.41 × 55,359.63
  4. Step 4: Simplify right side
    82,128.51x = 6,278,137,035.63
  5. Step 5: Solve for x
    x = 6,278,137,035.63/82,128.51
  6. Step 6: Final answer
    x = 76,442.85

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1.5x scale

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.