Home / 81,211.96-121,762.50-43,266.90

Finding the Fourth Proportional to 81,211.96, 121,762.50 and 43,266.90

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Solution

The fourth proportional to 81,211.96, 121,762.50 and 43,266.90 is: 64,870.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,211.96 : 121,762.50 = 43,266.90 : x
  2. Step 2: Convert to fraction form
    81,211.96/121,762.50 = 43,266.90/x
  3. Step 3: Cross multiply
    81,211.96x = 121,762.50 × 43,266.90
  4. Step 4: Simplify right side
    81,211.96x = 5,268,285,911.25
  5. Step 5: Solve for x
    x = 5,268,285,911.25/81,211.96
  6. Step 6: Final answer
    x = 64,870.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.