Home / 72,401.72-99,919.02-40,137.70

Finding the Fourth Proportional to 72,401.72, 99,919.02 and 40,137.70

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Solution

The fourth proportional to 72,401.72, 99,919.02 and 40,137.70 is: 55,392.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,401.72 : 99,919.02 = 40,137.70 : x
  2. Step 2: Convert to fraction form
    72,401.72/99,919.02 = 40,137.70/x
  3. Step 3: Cross multiply
    72,401.72x = 99,919.02 × 40,137.70
  4. Step 4: Simplify right side
    72,401.72x = 4,010,519,649.05
  5. Step 5: Solve for x
    x = 4,010,519,649.05/72,401.72
  6. Step 6: Final answer
    x = 55,392.60

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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.