Home / 72,220.28-99,667.41-39,954.74

Finding the Fourth Proportional to 72,220.28, 99,667.41 and 39,954.74

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Solution

The fourth proportional to 72,220.28, 99,667.41 and 39,954.74 is: 55,139.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,220.28 : 99,667.41 = 39,954.74 : x
  2. Step 2: Convert to fraction form
    72,220.28/99,667.41 = 39,954.74/x
  3. Step 3: Cross multiply
    72,220.28x = 99,667.41 × 39,954.74
  4. Step 4: Simplify right side
    72,220.28x = 3,982,184,954.69
  5. Step 5: Solve for x
    x = 3,982,184,954.69/72,220.28
  6. Step 6: Final answer
    x = 55,139.43

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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.