Home / 215,089.78-322,634.64-102,428.42

Finding the Fourth Proportional to 215,089.78, 322,634.64 and 102,428.42

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Solution

The fourth proportional to 215,089.78, 322,634.64 and 102,428.42 is: 153,642.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,089.78 : 322,634.64 = 102,428.42 : x
  2. Step 2: Convert to fraction form
    215,089.78/322,634.64 = 102,428.42/x
  3. Step 3: Cross multiply
    215,089.78x = 322,634.64 × 102,428.42
  4. Step 4: Simplify right side
    215,089.78x = 33,046,956,412.47
  5. Step 5: Solve for x
    x = 33,046,956,412.47/215,089.78
  6. Step 6: Final answer
    x = 153,642.62

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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.