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Finding the Fourth Proportional to 270,207.51, 405,302.07 and 128,120.85

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Solution

The fourth proportional to 270,207.51, 405,302.07 and 128,120.85 is: 192,176.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,207.51 : 405,302.07 = 128,120.85 : x
  2. Step 2: Convert to fraction form
    270,207.51/405,302.07 = 128,120.85/x
  3. Step 3: Cross multiply
    270,207.51x = 405,302.07 × 128,120.85
  4. Step 4: Simplify right side
    270,207.51x = 51,927,645,715.16
  5. Step 5: Solve for x
    x = 51,927,645,715.16/270,207.51
  6. Step 6: Final answer
    x = 192,176.92

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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.