Home / 279,015.35-385,071.30-158,143.70

Finding the Fourth Proportional to 279,015.35, 385,071.30 and 158,143.70

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Solution

The fourth proportional to 279,015.35, 385,071.30 and 158,143.70 is: 218,255.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,015.35 : 385,071.30 = 158,143.70 : x
  2. Step 2: Convert to fraction form
    279,015.35/385,071.30 = 158,143.70/x
  3. Step 3: Cross multiply
    279,015.35x = 385,071.30 × 158,143.70
  4. Step 4: Simplify right side
    279,015.35x = 60,896,601,108.49
  5. Step 5: Solve for x
    x = 60,896,601,108.49/279,015.35
  6. Step 6: Final answer
    x = 218,255.38

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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.