Home / 85,936.10-128,904.15-81,015.35

Finding the Fourth Proportional to 85,936.10, 128,904.15 and 81,015.35

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Solution

The fourth proportional to 85,936.10, 128,904.15 and 81,015.35 is: 121,523.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,936.10 : 128,904.15 = 81,015.35 : x
  2. Step 2: Convert to fraction form
    85,936.10/128,904.15 = 81,015.35/x
  3. Step 3: Cross multiply
    85,936.10x = 128,904.15 × 81,015.35
  4. Step 4: Simplify right side
    85,936.10x = 10,443,214,828.70
  5. Step 5: Solve for x
    x = 10,443,214,828.70/85,936.10
  6. Step 6: Final answer
    x = 121,523.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.