Home / 223,823.04-308,917.20-128,330.40

Finding the Fourth Proportional to 223,823.04, 308,917.20 and 128,330.40

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Solution

The fourth proportional to 223,823.04, 308,917.20 and 128,330.40 is: 177,119.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,823.04 : 308,917.20 = 128,330.40 : x
  2. Step 2: Convert to fraction form
    223,823.04/308,917.20 = 128,330.40/x
  3. Step 3: Cross multiply
    223,823.04x = 308,917.20 × 128,330.40
  4. Step 4: Simplify right side
    223,823.04x = 39,643,467,842.88
  5. Step 5: Solve for x
    x = 39,643,467,842.88/223,823.04
  6. Step 6: Final answer
    x = 177,119.69

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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.