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Finding the Fourth Proportional to 155,717.89, 214,882.74 and 87,738.88

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Solution

The fourth proportional to 155,717.89, 214,882.74 and 87,738.88 is: 121,075.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,717.89 : 214,882.74 = 87,738.88 : x
  2. Step 2: Convert to fraction form
    155,717.89/214,882.74 = 87,738.88/x
  3. Step 3: Cross multiply
    155,717.89x = 214,882.74 × 87,738.88
  4. Step 4: Simplify right side
    155,717.89x = 18,853,570,938.93
  5. Step 5: Solve for x
    x = 18,853,570,938.93/155,717.89
  6. Step 6: Final answer
    x = 121,075.18

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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.