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Finding the Fourth Proportional to 144,712.60, 217,068.90 and 100,389.40

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Solution

The fourth proportional to 144,712.60, 217,068.90 and 100,389.40 is: 150,584.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,712.60 : 217,068.90 = 100,389.40 : x
  2. Step 2: Convert to fraction form
    144,712.60/217,068.90 = 100,389.40/x
  3. Step 3: Cross multiply
    144,712.60x = 217,068.90 × 100,389.40
  4. Step 4: Simplify right side
    144,712.60x = 21,791,416,629.66
  5. Step 5: Solve for x
    x = 21,791,416,629.66/144,712.60
  6. Step 6: Final answer
    x = 150,584.10

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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.