Home / 128,800.20-177,727.32-71,438.84

Finding the Fourth Proportional to 128,800.20, 177,727.32 and 71,438.84

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Solution

The fourth proportional to 128,800.20, 177,727.32 and 71,438.84 is: 98,576.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,800.20 : 177,727.32 = 71,438.84 : x
  2. Step 2: Convert to fraction form
    128,800.20/177,727.32 = 71,438.84/x
  3. Step 3: Cross multiply
    128,800.20x = 177,727.32 × 71,438.84
  4. Step 4: Simplify right side
    128,800.20x = 12,696,633,577.11
  5. Step 5: Solve for x
    x = 12,696,633,577.11/128,800.20
  6. Step 6: Final answer
    x = 98,576.19

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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.