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Finding the Fourth Proportional to 273,415.84, 410,121.30 and 86,427.40

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Solution

The fourth proportional to 273,415.84, 410,121.30 and 86,427.40 is: 129,640.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    273,415.84 : 410,121.30 = 86,427.40 : x
  2. Step 2: Convert to fraction form
    273,415.84/410,121.30 = 86,427.40/x
  3. Step 3: Cross multiply
    273,415.84x = 410,121.30 × 86,427.40
  4. Step 4: Simplify right side
    273,415.84x = 35,445,717,643.62
  5. Step 5: Solve for x
    x = 35,445,717,643.62/273,415.84
  6. Step 6: Final answer
    x = 129,640.32

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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.