Home / 85,129.48-117,425.43-61,218.28

Finding the Fourth Proportional to 85,129.48, 117,425.43 and 61,218.28

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Solution

The fourth proportional to 85,129.48, 117,425.43 and 61,218.28 is: 84,442.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,129.48 : 117,425.43 = 61,218.28 : x
  2. Step 2: Convert to fraction form
    85,129.48/117,425.43 = 61,218.28/x
  3. Step 3: Cross multiply
    85,129.48x = 117,425.43 × 61,218.28
  4. Step 4: Simplify right side
    85,129.48x = 7,188,582,852.86
  5. Step 5: Solve for x
    x = 7,188,582,852.86/85,129.48
  6. Step 6: Final answer
    x = 84,442.93

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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.