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Finding the Fourth Proportional to 86,402.76, 119,241.30 and 65,144.52

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Solution

The fourth proportional to 86,402.76, 119,241.30 and 65,144.52 is: 89,903.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,402.76 : 119,241.30 = 65,144.52 : x
  2. Step 2: Convert to fraction form
    86,402.76/119,241.30 = 65,144.52/x
  3. Step 3: Cross multiply
    86,402.76x = 119,241.30 × 65,144.52
  4. Step 4: Simplify right side
    86,402.76x = 7,767,917,252.68
  5. Step 5: Solve for x
    x = 7,767,917,252.68/86,402.76
  6. Step 6: Final answer
    x = 89,903.58

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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.