Home / 85,128.63-117,421.22-53,242.17

Finding the Fourth Proportional to 85,128.63, 117,421.22 and 53,242.17

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Solution

The fourth proportional to 85,128.63, 117,421.22 and 53,242.17 is: 73,438.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,128.63 : 117,421.22 = 53,242.17 : x
  2. Step 2: Convert to fraction form
    85,128.63/117,421.22 = 53,242.17/x
  3. Step 3: Cross multiply
    85,128.63x = 117,421.22 × 53,242.17
  4. Step 4: Simplify right side
    85,128.63x = 6,251,760,556.85
  5. Step 5: Solve for x
    x = 6,251,760,556.85/85,128.63
  6. Step 6: Final answer
    x = 73,438.99

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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.