Home / 72,179.30-99,609.64-40,349.54

Finding the Fourth Proportional to 72,179.30, 99,609.64 and 40,349.54

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Solution

The fourth proportional to 72,179.30, 99,609.64 and 40,349.54 is: 55,683.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,179.30 : 99,609.64 = 40,349.54 : x
  2. Step 2: Convert to fraction form
    72,179.30/99,609.64 = 40,349.54/x
  3. Step 3: Cross multiply
    72,179.30x = 99,609.64 × 40,349.54
  4. Step 4: Simplify right side
    72,179.30x = 4,019,203,153.57
  5. Step 5: Solve for x
    x = 4,019,203,153.57/72,179.30
  6. Step 6: Final answer
    x = 55,683.60

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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.