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Finding the Fourth Proportional to 214,909.39, 322,428.48 and 86,759.70

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Solution

The fourth proportional to 214,909.39, 322,428.48 and 86,759.70 is: 130,165.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,909.39 : 322,428.48 = 86,759.70 : x
  2. Step 2: Convert to fraction form
    214,909.39/322,428.48 = 86,759.70/x
  3. Step 3: Cross multiply
    214,909.39x = 322,428.48 × 86,759.70
  4. Step 4: Simplify right side
    214,909.39x = 27,973,798,196.26
  5. Step 5: Solve for x
    x = 27,973,798,196.26/214,909.39
  6. Step 6: Final answer
    x = 130,165.55

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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.