Home / 210,240.09-315,401.68-77,121.51

Finding the Fourth Proportional to 210,240.09, 315,401.68 and 77,121.51

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Solution

The fourth proportional to 210,240.09, 315,401.68 and 77,121.51 is: 115,697.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,240.09 : 315,401.68 = 77,121.51 : x
  2. Step 2: Convert to fraction form
    210,240.09/315,401.68 = 77,121.51/x
  3. Step 3: Cross multiply
    210,240.09x = 315,401.68 × 77,121.51
  4. Step 4: Simplify right side
    210,240.09x = 24,324,253,818.14
  5. Step 5: Solve for x
    x = 24,324,253,818.14/210,240.09
  6. Step 6: Final answer
    x = 115,697.50

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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.