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Finding the Fourth Proportional to 155,672.74, 214,828.77 and 90,274.24

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Solution

The fourth proportional to 155,672.74, 214,828.77 and 90,274.24 is: 124,578.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,672.74 : 214,828.77 = 90,274.24 : x
  2. Step 2: Convert to fraction form
    155,672.74/214,828.77 = 90,274.24/x
  3. Step 3: Cross multiply
    155,672.74x = 214,828.77 × 90,274.24
  4. Step 4: Simplify right side
    155,672.74x = 19,393,503,941.88
  5. Step 5: Solve for x
    x = 19,393,503,941.88/155,672.74
  6. Step 6: Final answer
    x = 124,578.68

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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.