Home / 81,521.78-112,511.57-45,231.35

Finding the Fourth Proportional to 81,521.78, 112,511.57 and 45,231.35

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Solution

The fourth proportional to 81,521.78, 112,511.57 and 45,231.35 is: 62,425.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,521.78 : 112,511.57 = 45,231.35 : x
  2. Step 2: Convert to fraction form
    81,521.78/112,511.57 = 45,231.35/x
  3. Step 3: Cross multiply
    81,521.78x = 112,511.57 × 45,231.35
  4. Step 4: Simplify right side
    81,521.78x = 5,089,049,413.00
  5. Step 5: Solve for x
    x = 5,089,049,413.00/81,521.78
  6. Step 6: Final answer
    x = 62,425.65

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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.