Home / 128,376.63-177,184.26-86,009.04

Finding the Fourth Proportional to 128,376.63, 177,184.26 and 86,009.04

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Solution

The fourth proportional to 128,376.63, 177,184.26 and 86,009.04 is: 118,708.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,376.63 : 177,184.26 = 86,009.04 : x
  2. Step 2: Convert to fraction form
    128,376.63/177,184.26 = 86,009.04/x
  3. Step 3: Cross multiply
    128,376.63x = 177,184.26 × 86,009.04
  4. Step 4: Simplify right side
    128,376.63x = 15,239,448,105.71
  5. Step 5: Solve for x
    x = 15,239,448,105.71/128,376.63
  6. Step 6: Final answer
    x = 118,708.90

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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.