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Finding the Fourth Proportional to 203,478.94, 305,119.92 and 70,312.48

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Solution

The fourth proportional to 203,478.94, 305,119.92 and 70,312.48 is: 105,434.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,478.94 : 305,119.92 = 70,312.48 : x
  2. Step 2: Convert to fraction form
    203,478.94/305,119.92 = 70,312.48/x
  3. Step 3: Cross multiply
    203,478.94x = 305,119.92 × 70,312.48
  4. Step 4: Simplify right side
    203,478.94x = 21,453,738,272.60
  5. Step 5: Solve for x
    x = 21,453,738,272.60/203,478.94
  6. Step 6: Final answer
    x = 105,434.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.