Home / 70,208.10-105,312.60-28,091.70

Finding the Fourth Proportional to 70,208.10, 105,312.60 and 28,091.70

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Solution

The fourth proportional to 70,208.10, 105,312.60 and 28,091.70 is: 42,137.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,208.10 : 105,312.60 = 28,091.70 : x
  2. Step 2: Convert to fraction form
    70,208.10/105,312.60 = 28,091.70/x
  3. Step 3: Cross multiply
    70,208.10x = 105,312.60 × 28,091.70
  4. Step 4: Simplify right side
    70,208.10x = 2,958,409,965.42
  5. Step 5: Solve for x
    x = 2,958,409,965.42/70,208.10
  6. Step 6: Final answer
    x = 42,137.73

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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.