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Finding the Fourth Proportional to 216,433.89, 324,710.73 and 90,133.56

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Solution

The fourth proportional to 216,433.89, 324,710.73 and 90,133.56 is: 135,225.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,433.89 : 324,710.73 = 90,133.56 : x
  2. Step 2: Convert to fraction form
    216,433.89/324,710.73 = 90,133.56/x
  3. Step 3: Cross multiply
    216,433.89x = 324,710.73 × 90,133.56
  4. Step 4: Simplify right side
    216,433.89x = 29,267,334,065.10
  5. Step 5: Solve for x
    x = 29,267,334,065.10/216,433.89
  6. Step 6: Final answer
    x = 135,225.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.