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Finding the Fourth Proportional to 103,920.88, 143,214.85 and 75,191.90

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Solution

The fourth proportional to 103,920.88, 143,214.85 and 75,191.90 is: 103,623.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,920.88 : 143,214.85 = 75,191.90 : x
  2. Step 2: Convert to fraction form
    103,920.88/143,214.85 = 75,191.90/x
  3. Step 3: Cross multiply
    103,920.88x = 143,214.85 × 75,191.90
  4. Step 4: Simplify right side
    103,920.88x = 10,768,595,587.68
  5. Step 5: Solve for x
    x = 10,768,595,587.68/103,920.88
  6. Step 6: Final answer
    x = 103,623.03

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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.