Home / 81,239.36-112,120.74-45,431.37

Finding the Fourth Proportional to 81,239.36, 112,120.74 and 45,431.37

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Solution

The fourth proportional to 81,239.36, 112,120.74 and 45,431.37 is: 62,701.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,239.36 : 112,120.74 = 45,431.37 : x
  2. Step 2: Convert to fraction form
    81,239.36/112,120.74 = 45,431.37/x
  3. Step 3: Cross multiply
    81,239.36x = 112,120.74 × 45,431.37
  4. Step 4: Simplify right side
    81,239.36x = 5,093,798,823.61
  5. Step 5: Solve for x
    x = 5,093,798,823.61/81,239.36
  6. Step 6: Final answer
    x = 62,701.12

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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.