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Finding the Fourth Proportional to 72,728.24, 100,357.30 and 40,457.60

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Solution

The fourth proportional to 72,728.24, 100,357.30 and 40,457.60 is: 55,827.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,728.24 : 100,357.30 = 40,457.60 : x
  2. Step 2: Convert to fraction form
    72,728.24/100,357.30 = 40,457.60/x
  3. Step 3: Cross multiply
    72,728.24x = 100,357.30 × 40,457.60
  4. Step 4: Simplify right side
    72,728.24x = 4,060,215,500.48
  5. Step 5: Solve for x
    x = 4,060,215,500.48/72,728.24
  6. Step 6: Final answer
    x = 55,827.22

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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.