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Finding the Fourth Proportional to 216,019.20, 324,417.60 and 156,921.60

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Solution

The fourth proportional to 216,019.20, 324,417.60 and 156,921.60 is: 235,664.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,019.20 : 324,417.60 = 156,921.60 : x
  2. Step 2: Convert to fraction form
    216,019.20/324,417.60 = 156,921.60/x
  3. Step 3: Cross multiply
    216,019.20x = 324,417.60 × 156,921.60
  4. Step 4: Simplify right side
    216,019.20x = 50,908,128,860.16
  5. Step 5: Solve for x
    x = 50,908,128,860.16/216,019.20
  6. Step 6: Final answer
    x = 235,664.83

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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.