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Finding the Fourth Proportional to 77,485.41, 106,920.81 and 43,486.47

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Solution

The fourth proportional to 77,485.41, 106,920.81 and 43,486.47 is: 60,006.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,485.41 : 106,920.81 = 43,486.47 : x
  2. Step 2: Convert to fraction form
    77,485.41/106,920.81 = 43,486.47/x
  3. Step 3: Cross multiply
    77,485.41x = 106,920.81 × 43,486.47
  4. Step 4: Simplify right side
    77,485.41x = 4,649,608,596.44
  5. Step 5: Solve for x
    x = 4,649,608,596.44/77,485.41
  6. Step 6: Final answer
    x = 60,006.25

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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.