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Finding the Fourth Proportional to 205,312.40, 308,141.40 and 100,221.20

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Solution

The fourth proportional to 205,312.40, 308,141.40 and 100,221.20 is: 150,416.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,312.40 : 308,141.40 = 100,221.20 : x
  2. Step 2: Convert to fraction form
    205,312.40/308,141.40 = 100,221.20/x
  3. Step 3: Cross multiply
    205,312.40x = 308,141.40 × 100,221.20
  4. Step 4: Simplify right side
    205,312.40x = 30,882,300,877.68
  5. Step 5: Solve for x
    x = 30,882,300,877.68/205,312.40
  6. Step 6: Final answer
    x = 150,416.15

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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.