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Finding the Fourth Proportional to 159,958.62, 240,085.53 and 81,128.21

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Solution

The fourth proportional to 159,958.62, 240,085.53 and 81,128.21 is: 121,767.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,958.62 : 240,085.53 = 81,128.21 : x
  2. Step 2: Convert to fraction form
    159,958.62/240,085.53 = 81,128.21/x
  3. Step 3: Cross multiply
    159,958.62x = 240,085.53 × 81,128.21
  4. Step 4: Simplify right side
    159,958.62x = 19,477,708,095.37
  5. Step 5: Solve for x
    x = 19,477,708,095.37/159,958.62
  6. Step 6: Final answer
    x = 121,767.17

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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.