Home / 72,601.12-100,189.16-40,772.80

Finding the Fourth Proportional to 72,601.12, 100,189.16 and 40,772.80

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Solution

The fourth proportional to 72,601.12, 100,189.16 and 40,772.80 is: 56,266.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,601.12 : 100,189.16 = 40,772.80 : x
  2. Step 2: Convert to fraction form
    72,601.12/100,189.16 = 40,772.80/x
  3. Step 3: Cross multiply
    72,601.12x = 100,189.16 × 40,772.80
  4. Step 4: Simplify right side
    72,601.12x = 4,084,992,582.85
  5. Step 5: Solve for x
    x = 4,084,992,582.85/72,601.12
  6. Step 6: Final answer
    x = 56,266.25

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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.