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Finding the Fourth Proportional to 221,116.95, 305,141.49 and 125,623.80

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Solution

The fourth proportional to 221,116.95, 305,141.49 and 125,623.80 is: 173,360.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,116.95 : 305,141.49 = 125,623.80 : x
  2. Step 2: Convert to fraction form
    221,116.95/305,141.49 = 125,623.80/x
  3. Step 3: Cross multiply
    221,116.95x = 305,141.49 × 125,623.80
  4. Step 4: Simplify right side
    221,116.95x = 38,333,033,511.46
  5. Step 5: Solve for x
    x = 38,333,033,511.46/221,116.95
  6. Step 6: Final answer
    x = 173,360.90

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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.