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Finding the Fourth Proportional to 221,357.95, 305,472.55 and 125,864.64

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Solution

The fourth proportional to 221,357.95, 305,472.55 and 125,864.64 is: 173,692.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,357.95 : 305,472.55 = 125,864.64 : x
  2. Step 2: Convert to fraction form
    221,357.95/305,472.55 = 125,864.64/x
  3. Step 3: Cross multiply
    221,357.95x = 305,472.55 × 125,864.64
  4. Step 4: Simplify right side
    221,357.95x = 38,448,192,850.29
  5. Step 5: Solve for x
    x = 38,448,192,850.29/221,357.95
  6. Step 6: Final answer
    x = 173,692.40

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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.