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Finding the Fourth Proportional to 216,429.60, 324,644.40 and 136,713.45

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Solution

The fourth proportional to 216,429.60, 324,644.40 and 136,713.45 is: 205,070.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,429.60 : 324,644.40 = 136,713.45 : x
  2. Step 2: Convert to fraction form
    216,429.60/324,644.40 = 136,713.45/x
  3. Step 3: Cross multiply
    216,429.60x = 324,644.40 × 136,713.45
  4. Step 4: Simplify right side
    216,429.60x = 44,383,255,947.18
  5. Step 5: Solve for x
    x = 44,383,255,947.18/216,429.60
  6. Step 6: Final answer
    x = 205,070.18

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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.