Home / 128,382.64-177,192.56-86,015.04

Finding the Fourth Proportional to 128,382.64, 177,192.56 and 86,015.04

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Solution

The fourth proportional to 128,382.64, 177,192.56 and 86,015.04 is: 118,717.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,382.64 : 177,192.56 = 86,015.04 : x
  2. Step 2: Convert to fraction form
    128,382.64/177,192.56 = 86,015.04/x
  3. Step 3: Cross multiply
    128,382.64x = 177,192.56 × 86,015.04
  4. Step 4: Simplify right side
    128,382.64x = 15,241,225,136.10
  5. Step 5: Solve for x
    x = 15,241,225,136.10/128,382.64
  6. Step 6: Final answer
    x = 118,717.18

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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.