Home / 72,189.56-99,623.78-40,359.80

Finding the Fourth Proportional to 72,189.56, 99,623.78 and 40,359.80

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Solution

The fourth proportional to 72,189.56, 99,623.78 and 40,359.80 is: 55,697.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,189.56 : 99,623.78 = 40,359.80 : x
  2. Step 2: Convert to fraction form
    72,189.56/99,623.78 = 40,359.80/x
  3. Step 3: Cross multiply
    72,189.56x = 99,623.78 × 40,359.80
  4. Step 4: Simplify right side
    72,189.56x = 4,020,795,836.04
  5. Step 5: Solve for x
    x = 4,020,795,836.04/72,189.56
  6. Step 6: Final answer
    x = 55,697.75

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1.5x scale

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.