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Finding the Fourth Proportional to 221,641.48, 305,860.98 and 121,040.20

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Solution

The fourth proportional to 221,641.48, 305,860.98 and 121,040.20 is: 167,033.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,641.48 : 305,860.98 = 121,040.20 : x
  2. Step 2: Convert to fraction form
    221,641.48/305,860.98 = 121,040.20/x
  3. Step 3: Cross multiply
    221,641.48x = 305,860.98 × 121,040.20
  4. Step 4: Simplify right side
    221,641.48x = 37,021,474,191.40
  5. Step 5: Solve for x
    x = 37,021,474,191.40/221,641.48
  6. Step 6: Final answer
    x = 167,033.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.