Home / 55,128.35-76,090.64-31,268.99

Finding the Fourth Proportional to 55,128.35, 76,090.64 and 31,268.99

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Solution

The fourth proportional to 55,128.35, 76,090.64 and 31,268.99 is: 43,158.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,128.35 : 76,090.64 = 31,268.99 : x
  2. Step 2: Convert to fraction form
    55,128.35/76,090.64 = 31,268.99/x
  3. Step 3: Cross multiply
    55,128.35x = 76,090.64 × 31,268.99
  4. Step 4: Simplify right side
    55,128.35x = 2,379,276,924.46
  5. Step 5: Solve for x
    x = 2,379,276,924.46/55,128.35
  6. Step 6: Final answer
    x = 43,158.87

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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.