Home / 100,105.77-138,176.72-57,692.55

Finding the Fourth Proportional to 100,105.77, 138,176.72 and 57,692.55

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Solution

The fourth proportional to 100,105.77, 138,176.72 and 57,692.55 is: 79,633.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,105.77 : 138,176.72 = 57,692.55 : x
  2. Step 2: Convert to fraction form
    100,105.77/138,176.72 = 57,692.55/x
  3. Step 3: Cross multiply
    100,105.77x = 138,176.72 × 57,692.55
  4. Step 4: Simplify right side
    100,105.77x = 7,971,767,038.97
  5. Step 5: Solve for x
    x = 7,971,767,038.97/100,105.77
  6. Step 6: Final answer
    x = 79,633.44

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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.