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Finding the Fourth Proportional to 221,374.21, 305,496.47 and 125,886.76

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Solution

The fourth proportional to 221,374.21, 305,496.47 and 125,886.76 is: 173,723.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,374.21 : 305,496.47 = 125,886.76 : x
  2. Step 2: Convert to fraction form
    221,374.21/305,496.47 = 125,886.76/x
  3. Step 3: Cross multiply
    221,374.21x = 305,496.47 × 125,886.76
  4. Step 4: Simplify right side
    221,374.21x = 38,457,960,799.74
  5. Step 5: Solve for x
    x = 38,457,960,799.74/221,374.21
  6. Step 6: Final answer
    x = 173,723.76

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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.