Home / 210,215.77-315,136.12-77,064.93

Finding the Fourth Proportional to 210,215.77, 315,136.12 and 77,064.93

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Solution

The fourth proportional to 210,215.77, 315,136.12 and 77,064.93 is: 115,528.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,215.77 : 315,136.12 = 77,064.93 : x
  2. Step 2: Convert to fraction form
    210,215.77/315,136.12 = 77,064.93/x
  3. Step 3: Cross multiply
    210,215.77x = 315,136.12 × 77,064.93
  4. Step 4: Simplify right side
    210,215.77x = 24,285,942,642.95
  5. Step 5: Solve for x
    x = 24,285,942,642.95/210,215.77
  6. Step 6: Final answer
    x = 115,528.65

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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.