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Finding the Fourth Proportional to 155,419.32, 214,470.80 and 91,744.80

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Solution

The fourth proportional to 155,419.32, 214,470.80 and 91,744.80 is: 126,603.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,419.32 : 214,470.80 = 91,744.80 : x
  2. Step 2: Convert to fraction form
    155,419.32/214,470.80 = 91,744.80/x
  3. Step 3: Cross multiply
    155,419.32x = 214,470.80 × 91,744.80
  4. Step 4: Simplify right side
    155,419.32x = 19,676,580,651.84
  5. Step 5: Solve for x
    x = 19,676,580,651.84/155,419.32
  6. Step 6: Final answer
    x = 126,603.18

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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.