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Finding the Fourth Proportional to 72,805.08, 100,480.68 and 40,980.20

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Solution

The fourth proportional to 72,805.08, 100,480.68 and 40,980.20 is: 56,558.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,805.08 : 100,480.68 = 40,980.20 : x
  2. Step 2: Convert to fraction form
    72,805.08/100,480.68 = 40,980.20/x
  3. Step 3: Cross multiply
    72,805.08x = 100,480.68 × 40,980.20
  4. Step 4: Simplify right side
    72,805.08x = 4,117,718,362.54
  5. Step 5: Solve for x
    x = 4,117,718,362.54/72,805.08
  6. Step 6: Final answer
    x = 56,558.12

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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.