Home / 100,513.77-138,709.19-58,072.33

Finding the Fourth Proportional to 100,513.77, 138,709.19 and 58,072.33

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Solution

The fourth proportional to 100,513.77, 138,709.19 and 58,072.33 is: 80,139.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,513.77 : 138,709.19 = 58,072.33 : x
  2. Step 2: Convert to fraction form
    100,513.77/138,709.19 = 58,072.33/x
  3. Step 3: Cross multiply
    100,513.77x = 138,709.19 × 58,072.33
  4. Step 4: Simplify right side
    100,513.77x = 8,055,165,855.71
  5. Step 5: Solve for x
    x = 8,055,165,855.71/100,513.77
  6. Step 6: Final answer
    x = 80,139.92

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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.