Home / 210,218.53-315,140.24-77,067.69

Finding the Fourth Proportional to 210,218.53, 315,140.24 and 77,067.69

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Solution

The fourth proportional to 210,218.53, 315,140.24 and 77,067.69 is: 115,532.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,218.53 : 315,140.24 = 77,067.69 : x
  2. Step 2: Convert to fraction form
    210,218.53/315,140.24 = 77,067.69/x
  3. Step 3: Cross multiply
    210,218.53x = 315,140.24 × 77,067.69
  4. Step 4: Simplify right side
    210,218.53x = 24,287,130,515.51
  5. Step 5: Solve for x
    x = 24,287,130,515.51/210,218.53
  6. Step 6: Final answer
    x = 115,532.78

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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.