Home / 56,609.78-78,039.16-39,561.09

Finding the Fourth Proportional to 56,609.78, 78,039.16 and 39,561.09

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Solution

The fourth proportional to 56,609.78, 78,039.16 and 39,561.09 is: 54,536.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,609.78 : 78,039.16 = 39,561.09 : x
  2. Step 2: Convert to fraction form
    56,609.78/78,039.16 = 39,561.09/x
  3. Step 3: Cross multiply
    56,609.78x = 78,039.16 × 39,561.09
  4. Step 4: Simplify right side
    56,609.78x = 3,087,314,232.28
  5. Step 5: Solve for x
    x = 3,087,314,232.28/56,609.78
  6. Step 6: Final answer
    x = 54,536.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.