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Finding the Fourth Proportional to 221,503.40, 305,703.90 and 125,991.64

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Solution

The fourth proportional to 221,503.40, 305,703.90 and 125,991.64 is: 173,885.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,503.40 : 305,703.90 = 125,991.64 : x
  2. Step 2: Convert to fraction form
    221,503.40/305,703.90 = 125,991.64/x
  3. Step 3: Cross multiply
    221,503.40x = 305,703.90 × 125,991.64
  4. Step 4: Simplify right side
    221,503.40x = 38,516,135,715.40
  5. Step 5: Solve for x
    x = 38,516,135,715.40/221,503.40
  6. Step 6: Final answer
    x = 173,885.08

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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.