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Finding the Fourth Proportional to 144,881.32, 217,469.64 and 99,905.65

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Solution

The fourth proportional to 144,881.32, 217,469.64 and 99,905.65 is: 149,960.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,881.32 : 217,469.64 = 99,905.65 : x
  2. Step 2: Convert to fraction form
    144,881.32/217,469.64 = 99,905.65/x
  3. Step 3: Cross multiply
    144,881.32x = 217,469.64 × 99,905.65
  4. Step 4: Simplify right side
    144,881.32x = 21,726,445,739.47
  5. Step 5: Solve for x
    x = 21,726,445,739.47/144,881.32
  6. Step 6: Final answer
    x = 149,960.30

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1.5x scale

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.