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Finding the Fourth Proportional to 136,505.40, 204,911.70 and 105,478.20

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Solution

The fourth proportional to 136,505.40, 204,911.70 and 105,478.20 is: 158,335.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,505.40 : 204,911.70 = 105,478.20 : x
  2. Step 2: Convert to fraction form
    136,505.40/204,911.70 = 105,478.20/x
  3. Step 3: Cross multiply
    136,505.40x = 204,911.70 × 105,478.20
  4. Step 4: Simplify right side
    136,505.40x = 21,613,717,274.94
  5. Step 5: Solve for x
    x = 21,613,717,274.94/136,505.40
  6. Step 6: Final answer
    x = 158,335.99

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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.