Home / 72,072.12-99,462.84-39,811.20

Finding the Fourth Proportional to 72,072.12, 99,462.84 and 39,811.20

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Solution

The fourth proportional to 72,072.12, 99,462.84 and 39,811.20 is: 54,941.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,072.12 : 99,462.84 = 39,811.20 : x
  2. Step 2: Convert to fraction form
    72,072.12/99,462.84 = 39,811.20/x
  3. Step 3: Cross multiply
    72,072.12x = 99,462.84 × 39,811.20
  4. Step 4: Simplify right side
    72,072.12x = 3,959,735,015.81
  5. Step 5: Solve for x
    x = 3,959,735,015.81/72,072.12
  6. Step 6: Final answer
    x = 54,941.29

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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.