Home / 83,778.09-125,708.13-39,409.32

Finding the Fourth Proportional to 83,778.09, 125,708.13 and 39,409.32

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Solution

The fourth proportional to 83,778.09, 125,708.13 and 39,409.32 is: 59,133.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,778.09 : 125,708.13 = 39,409.32 : x
  2. Step 2: Convert to fraction form
    83,778.09/125,708.13 = 39,409.32/x
  3. Step 3: Cross multiply
    83,778.09x = 125,708.13 × 39,409.32
  4. Step 4: Simplify right side
    83,778.09x = 4,954,071,921.77
  5. Step 5: Solve for x
    x = 4,954,071,921.77/83,778.09
  6. Step 6: Final answer
    x = 59,133.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.