Home / 72,236.56-99,690.60-40,406.80

Finding the Fourth Proportional to 72,236.56, 99,690.60 and 40,406.80

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Solution

The fourth proportional to 72,236.56, 99,690.60 and 40,406.80 is: 55,763.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,236.56 : 99,690.60 = 40,406.80 : x
  2. Step 2: Convert to fraction form
    72,236.56/99,690.60 = 40,406.80/x
  3. Step 3: Cross multiply
    72,236.56x = 99,690.60 × 40,406.80
  4. Step 4: Simplify right side
    72,236.56x = 4,028,178,136.08
  5. Step 5: Solve for x
    x = 4,028,178,136.08/72,236.56
  6. Step 6: Final answer
    x = 55,763.70

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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.