Home / 210,216.15-315,136.68-77,065.30

Finding the Fourth Proportional to 210,216.15, 315,136.68 and 77,065.30

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Solution

The fourth proportional to 210,216.15, 315,136.68 and 77,065.30 is: 115,529.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,216.15 : 315,136.68 = 77,065.30 : x
  2. Step 2: Convert to fraction form
    210,216.15/315,136.68 = 77,065.30/x
  3. Step 3: Cross multiply
    210,216.15x = 315,136.68 × 77,065.30
  4. Step 4: Simplify right side
    210,216.15x = 24,286,102,785.20
  5. Step 5: Solve for x
    x = 24,286,102,785.20/210,216.15
  6. Step 6: Final answer
    x = 115,529.20

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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.