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Finding the Fourth Proportional to 72,004.68, 99,365.40 and 40,174.20

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Solution

The fourth proportional to 72,004.68, 99,365.40 and 40,174.20 is: 55,439.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,004.68 : 99,365.40 = 40,174.20 : x
  2. Step 2: Convert to fraction form
    72,004.68/99,365.40 = 40,174.20/x
  3. Step 3: Cross multiply
    72,004.68x = 99,365.40 × 40,174.20
  4. Step 4: Simplify right side
    72,004.68x = 3,991,925,452.68
  5. Step 5: Solve for x
    x = 3,991,925,452.68/72,004.68
  6. Step 6: Final answer
    x = 55,439.81

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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.