Home / 128,449.40-177,260.00-71,860.77

Finding the Fourth Proportional to 128,449.40, 177,260.00 and 71,860.77

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Solution

The fourth proportional to 128,449.40, 177,260.00 and 71,860.77 is: 99,167.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,449.40 : 177,260.00 = 71,860.77 : x
  2. Step 2: Convert to fraction form
    128,449.40/177,260.00 = 71,860.77/x
  3. Step 3: Cross multiply
    128,449.40x = 177,260.00 × 71,860.77
  4. Step 4: Simplify right side
    128,449.40x = 12,738,039,730.90
  5. Step 5: Solve for x
    x = 12,738,039,730.90/128,449.40
  6. Step 6: Final answer
    x = 99,167.77

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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.