Home / 72,001.72-99,362.12-40,170.60

Finding the Fourth Proportional to 72,001.72, 99,362.12 and 40,170.60

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Solution

The fourth proportional to 72,001.72, 99,362.12 and 40,170.60 is: 55,435.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,001.72 : 99,362.12 = 40,170.60 : x
  2. Step 2: Convert to fraction form
    72,001.72/99,362.12 = 40,170.60/x
  3. Step 3: Cross multiply
    72,001.72x = 99,362.12 × 40,170.60
  4. Step 4: Simplify right side
    72,001.72x = 3,991,435,977.67
  5. Step 5: Solve for x
    x = 3,991,435,977.67/72,001.72
  6. Step 6: Final answer
    x = 55,435.29

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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.