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Finding the Fourth Proportional to 72,803.02, 100,451.55 and 40,960.30

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Solution

The fourth proportional to 72,803.02, 100,451.55 and 40,960.30 is: 56,515.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,803.02 : 100,451.55 = 40,960.30 : x
  2. Step 2: Convert to fraction form
    72,803.02/100,451.55 = 40,960.30/x
  3. Step 3: Cross multiply
    72,803.02x = 100,451.55 × 40,960.30
  4. Step 4: Simplify right side
    72,803.02x = 4,114,525,623.47
  5. Step 5: Solve for x
    x = 4,114,525,623.47/72,803.02
  6. Step 6: Final answer
    x = 56,515.86

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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.