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Finding the Fourth Proportional to 86,443.54, 129,665.34 and 27,285.20

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Solution

The fourth proportional to 86,443.54, 129,665.34 and 27,285.20 is: 40,927.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,443.54 : 129,665.34 = 27,285.20 : x
  2. Step 2: Convert to fraction form
    86,443.54/129,665.34 = 27,285.20/x
  3. Step 3: Cross multiply
    86,443.54x = 129,665.34 × 27,285.20
  4. Step 4: Simplify right side
    86,443.54x = 3,537,944,734.97
  5. Step 5: Solve for x
    x = 3,537,944,734.97/86,443.54
  6. Step 6: Final answer
    x = 40,927.81

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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.