Home / 72,008.16-99,361.38-40,170.90

Finding the Fourth Proportional to 72,008.16, 99,361.38 and 40,170.90

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Solution

The fourth proportional to 72,008.16, 99,361.38 and 40,170.90 is: 55,430.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,008.16 : 99,361.38 = 40,170.90 : x
  2. Step 2: Convert to fraction form
    72,008.16/99,361.38 = 40,170.90/x
  3. Step 3: Cross multiply
    72,008.16x = 99,361.38 × 40,170.90
  4. Step 4: Simplify right side
    72,008.16x = 3,991,436,059.84
  5. Step 5: Solve for x
    x = 3,991,436,059.84/72,008.16
  6. Step 6: Final answer
    x = 55,430.33

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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.