Home / 78,211.56-107,903.64-51,368.60

Finding the Fourth Proportional to 78,211.56, 107,903.64 and 51,368.60

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Solution

The fourth proportional to 78,211.56, 107,903.64 and 51,368.60 is: 70,870.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,211.56 : 107,903.64 = 51,368.60 : x
  2. Step 2: Convert to fraction form
    78,211.56/107,903.64 = 51,368.60/x
  3. Step 3: Cross multiply
    78,211.56x = 107,903.64 × 51,368.60
  4. Step 4: Simplify right side
    78,211.56x = 5,542,858,921.70
  5. Step 5: Solve for x
    x = 5,542,858,921.70/78,211.56
  6. Step 6: Final answer
    x = 70,870.07

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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.