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Finding the Fourth Proportional to 154,662.68, 213,452.21 and 86,698.01

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Solution

The fourth proportional to 154,662.68, 213,452.21 and 86,698.01 is: 119,653.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,662.68 : 213,452.21 = 86,698.01 : x
  2. Step 2: Convert to fraction form
    154,662.68/213,452.21 = 86,698.01/x
  3. Step 3: Cross multiply
    154,662.68x = 213,452.21 × 86,698.01
  4. Step 4: Simplify right side
    154,662.68x = 18,505,881,837.10
  5. Step 5: Solve for x
    x = 18,505,881,837.10/154,662.68
  6. Step 6: Final answer
    x = 119,653.18

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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.