Home / 128,202.90-176,917.41-77,918.10

Finding the Fourth Proportional to 128,202.90, 176,917.41 and 77,918.10

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Solution

The fourth proportional to 128,202.90, 176,917.41 and 77,918.10 is: 107,525.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,202.90 : 176,917.41 = 77,918.10 : x
  2. Step 2: Convert to fraction form
    128,202.90/176,917.41 = 77,918.10/x
  3. Step 3: Cross multiply
    128,202.90x = 176,917.41 × 77,918.10
  4. Step 4: Simplify right side
    128,202.90x = 13,785,068,444.12
  5. Step 5: Solve for x
    x = 13,785,068,444.12/128,202.90
  6. Step 6: Final answer
    x = 107,525.40

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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.