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Finding the Fourth Proportional to 221,439.69, 305,603.69 and 125,940.69

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Solution

The fourth proportional to 221,439.69, 305,603.69 and 125,940.69 is: 173,807.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,439.69 : 305,603.69 = 125,940.69 : x
  2. Step 2: Convert to fraction form
    221,439.69/305,603.69 = 125,940.69/x
  3. Step 3: Cross multiply
    221,439.69x = 305,603.69 × 125,940.69
  4. Step 4: Simplify right side
    221,439.69x = 38,487,938,955.44
  5. Step 5: Solve for x
    x = 38,487,938,955.44/221,439.69
  6. Step 6: Final answer
    x = 173,807.77

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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.