Home / 85,943.10-128,914.65-68,228.40

Finding the Fourth Proportional to 85,943.10, 128,914.65 and 68,228.40

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Solution

The fourth proportional to 85,943.10, 128,914.65 and 68,228.40 is: 102,342.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,943.10 : 128,914.65 = 68,228.40 : x
  2. Step 2: Convert to fraction form
    85,943.10/128,914.65 = 68,228.40/x
  3. Step 3: Cross multiply
    85,943.10x = 128,914.65 × 68,228.40
  4. Step 4: Simplify right side
    85,943.10x = 8,795,640,306.06
  5. Step 5: Solve for x
    x = 8,795,640,306.06/85,943.10
  6. Step 6: Final answer
    x = 102,342.60

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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.