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Finding the Fourth Proportional to 221,363.64, 305,480.40 and 125,870.33

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Solution

The fourth proportional to 221,363.64, 305,480.40 and 125,870.33 is: 173,700.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,363.64 : 305,480.40 = 125,870.33 : x
  2. Step 2: Convert to fraction form
    221,363.64/305,480.40 = 125,870.33/x
  3. Step 3: Cross multiply
    221,363.64x = 305,480.40 × 125,870.33
  4. Step 4: Simplify right side
    221,363.64x = 38,450,919,048.22
  5. Step 5: Solve for x
    x = 38,450,919,048.22/221,363.64
  6. Step 6: Final answer
    x = 173,700.25

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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.