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Finding the Fourth Proportional to 216,007.60, 323,896.20 and 91,207.60

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Solution

The fourth proportional to 216,007.60, 323,896.20 and 91,207.60 is: 136,762.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,007.60 : 323,896.20 = 91,207.60 : x
  2. Step 2: Convert to fraction form
    216,007.60/323,896.20 = 91,207.60/x
  3. Step 3: Cross multiply
    216,007.60x = 323,896.20 × 91,207.60
  4. Step 4: Simplify right side
    216,007.60x = 29,541,795,051.12
  5. Step 5: Solve for x
    x = 29,541,795,051.12/216,007.60
  6. Step 6: Final answer
    x = 136,762.76

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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.