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Finding the Fourth Proportional to 86,415.54, 129,623.29 and 27,255.79

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Solution

The fourth proportional to 86,415.54, 129,623.29 and 27,255.79 is: 40,883.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,415.54 : 129,623.29 = 27,255.79 : x
  2. Step 2: Convert to fraction form
    86,415.54/129,623.29 = 27,255.79/x
  3. Step 3: Cross multiply
    86,415.54x = 129,623.29 × 27,255.79
  4. Step 4: Simplify right side
    86,415.54x = 3,532,985,171.35
  5. Step 5: Solve for x
    x = 3,532,985,171.35/86,415.54
  6. Step 6: Final answer
    x = 40,883.68

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1.5x scale

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.