Home / 128,385.64-177,196.70-86,018.04

Finding the Fourth Proportional to 128,385.64, 177,196.70 and 86,018.04

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Solution

The fourth proportional to 128,385.64, 177,196.70 and 86,018.04 is: 118,721.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,385.64 : 177,196.70 = 86,018.04 : x
  2. Step 2: Convert to fraction form
    128,385.64/177,196.70 = 86,018.04/x
  3. Step 3: Cross multiply
    128,385.64x = 177,196.70 × 86,018.04
  4. Step 4: Simplify right side
    128,385.64x = 15,242,112,828.47
  5. Step 5: Solve for x
    x = 15,242,112,828.47/128,385.64
  6. Step 6: Final answer
    x = 118,721.32

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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.