Home / 72,471.02-100,015.78-40,208.80

Finding the Fourth Proportional to 72,471.02, 100,015.78 and 40,208.80

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Solution

The fourth proportional to 72,471.02, 100,015.78 and 40,208.80 is: 55,491.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,471.02 : 100,015.78 = 40,208.80 : x
  2. Step 2: Convert to fraction form
    72,471.02/100,015.78 = 40,208.80/x
  3. Step 3: Cross multiply
    72,471.02x = 100,015.78 × 40,208.80
  4. Step 4: Simplify right side
    72,471.02x = 4,021,514,494.86
  5. Step 5: Solve for x
    x = 4,021,514,494.86/72,471.02
  6. Step 6: Final answer
    x = 55,491.35

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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.