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Finding the Fourth Proportional to 86,376.39, 129,322.59 and 65,249.97

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Solution

The fourth proportional to 86,376.39, 129,322.59 and 65,249.97 is: 97,692.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,376.39 : 129,322.59 = 65,249.97 : x
  2. Step 2: Convert to fraction form
    86,376.39/129,322.59 = 65,249.97/x
  3. Step 3: Cross multiply
    86,376.39x = 129,322.59 × 65,249.97
  4. Step 4: Simplify right side
    86,376.39x = 8,438,295,117.82
  5. Step 5: Solve for x
    x = 8,438,295,117.82/86,376.39
  6. Step 6: Final answer
    x = 97,692.15

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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.