Home / 210,236.81-315,396.75-77,118.30

Finding the Fourth Proportional to 210,236.81, 315,396.75 and 77,118.30

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Solution

The fourth proportional to 210,236.81, 315,396.75 and 77,118.30 is: 115,692.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,236.81 : 315,396.75 = 77,118.30 : x
  2. Step 2: Convert to fraction form
    210,236.81/315,396.75 = 77,118.30/x
  3. Step 3: Cross multiply
    210,236.81x = 315,396.75 × 77,118.30
  4. Step 4: Simplify right side
    210,236.81x = 24,322,861,185.53
  5. Step 5: Solve for x
    x = 24,322,861,185.53/210,236.81
  6. Step 6: Final answer
    x = 115,692.69

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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.