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Finding the Fourth Proportional to 216,969.18, 325,505.73 and 90,539.09

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Solution

The fourth proportional to 216,969.18, 325,505.73 and 90,539.09 is: 135,830.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,969.18 : 325,505.73 = 90,539.09 : x
  2. Step 2: Convert to fraction form
    216,969.18/325,505.73 = 90,539.09/x
  3. Step 3: Cross multiply
    216,969.18x = 325,505.73 × 90,539.09
  4. Step 4: Simplify right side
    216,969.18x = 29,470,992,795.51
  5. Step 5: Solve for x
    x = 29,470,992,795.51/216,969.18
  6. Step 6: Final answer
    x = 135,830.32

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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.