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Finding the Fourth Proportional to 121,203.40, 181,545.90 and 100,467.40

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Solution

The fourth proportional to 121,203.40, 181,545.90 and 100,467.40 is: 150,486.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,203.40 : 181,545.90 = 100,467.40 : x
  2. Step 2: Convert to fraction form
    121,203.40/181,545.90 = 100,467.40/x
  3. Step 3: Cross multiply
    121,203.40x = 181,545.90 × 100,467.40
  4. Step 4: Simplify right side
    121,203.40x = 18,239,444,553.66
  5. Step 5: Solve for x
    x = 18,239,444,553.66/121,203.40
  6. Step 6: Final answer
    x = 150,486.25

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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.