Home / 128,824.86-177,778.33-72,236.26

Finding the Fourth Proportional to 128,824.86, 177,778.33 and 72,236.26

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Solution

The fourth proportional to 128,824.86, 177,778.33 and 72,236.26 is: 99,686.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,824.86 : 177,778.33 = 72,236.26 : x
  2. Step 2: Convert to fraction form
    128,824.86/177,778.33 = 72,236.26/x
  3. Step 3: Cross multiply
    128,824.86x = 177,778.33 × 72,236.26
  4. Step 4: Simplify right side
    128,824.86x = 12,842,041,668.25
  5. Step 5: Solve for x
    x = 12,842,041,668.25/128,824.86
  6. Step 6: Final answer
    x = 99,686.05

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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.