Home / 128,764.14-177,692.61-71,403.54

Finding the Fourth Proportional to 128,764.14, 177,692.61 and 71,403.54

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Solution

The fourth proportional to 128,764.14, 177,692.61 and 71,403.54 is: 98,535.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,764.14 : 177,692.61 = 71,403.54 : x
  2. Step 2: Convert to fraction form
    128,764.14/177,692.61 = 71,403.54/x
  3. Step 3: Cross multiply
    128,764.14x = 177,692.61 × 71,403.54
  4. Step 4: Simplify right side
    128,764.14x = 12,687,881,385.84
  5. Step 5: Solve for x
    x = 12,687,881,385.84/128,764.14
  6. Step 6: Final answer
    x = 98,535.83

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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.