Home / 128,751.12-177,675.98-72,162.50

Finding the Fourth Proportional to 128,751.12, 177,675.98 and 72,162.50

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Solution

The fourth proportional to 128,751.12, 177,675.98 and 72,162.50 is: 99,583.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,751.12 : 177,675.98 = 72,162.50 : x
  2. Step 2: Convert to fraction form
    128,751.12/177,675.98 = 72,162.50/x
  3. Step 3: Cross multiply
    128,751.12x = 177,675.98 × 72,162.50
  4. Step 4: Simplify right side
    128,751.12x = 12,821,542,063.47
  5. Step 5: Solve for x
    x = 12,821,542,063.47/128,751.12
  6. Step 6: Final answer
    x = 99,583.93

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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.