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Finding the Fourth Proportional to 243,009.40, 364,514.10 and 136,721.20

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Solution

The fourth proportional to 243,009.40, 364,514.10 and 136,721.20 is: 205,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,009.40 : 364,514.10 = 136,721.20 : x
  2. Step 2: Convert to fraction form
    243,009.40/364,514.10 = 136,721.20/x
  3. Step 3: Cross multiply
    243,009.40x = 364,514.10 × 136,721.20
  4. Step 4: Simplify right side
    243,009.40x = 49,836,805,168.92
  5. Step 5: Solve for x
    x = 49,836,805,168.92/243,009.40
  6. Step 6: Final answer
    x = 205,081.80

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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.