Home / 72,621.48-100,211.88-40,789.32

Finding the Fourth Proportional to 72,621.48, 100,211.88 and 40,789.32

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Solution

The fourth proportional to 72,621.48, 100,211.88 and 40,789.32 is: 56,286.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,621.48 : 100,211.88 = 40,789.32 : x
  2. Step 2: Convert to fraction form
    72,621.48/100,211.88 = 40,789.32/x
  3. Step 3: Cross multiply
    72,621.48x = 100,211.88 × 40,789.32
  4. Step 4: Simplify right side
    72,621.48x = 4,087,574,441.12
  5. Step 5: Solve for x
    x = 4,087,574,441.12/72,621.48
  6. Step 6: Final answer
    x = 56,286.03

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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.