Home / 128,265.21-177,005.07-71,676.59

Finding the Fourth Proportional to 128,265.21, 177,005.07 and 71,676.59

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Solution

The fourth proportional to 128,265.21, 177,005.07 and 71,676.59 is: 98,913.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,265.21 : 177,005.07 = 71,676.59 : x
  2. Step 2: Convert to fraction form
    128,265.21/177,005.07 = 71,676.59/x
  3. Step 3: Cross multiply
    128,265.21x = 177,005.07 × 71,676.59
  4. Step 4: Simplify right side
    128,265.21x = 12,687,118,945.29
  5. Step 5: Solve for x
    x = 12,687,118,945.29/128,265.21
  6. Step 6: Final answer
    x = 98,913.17

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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.