Home / 85,734.80-128,622.46-35,787.14

Finding the Fourth Proportional to 85,734.80, 128,622.46 and 35,787.14

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Solution

The fourth proportional to 85,734.80, 128,622.46 and 35,787.14 is: 53,689.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,734.80 : 128,622.46 = 35,787.14 : x
  2. Step 2: Convert to fraction form
    85,734.80/128,622.46 = 35,787.14/x
  3. Step 3: Cross multiply
    85,734.80x = 128,622.46 × 35,787.14
  4. Step 4: Simplify right side
    85,734.80x = 4,603,029,983.16
  5. Step 5: Solve for x
    x = 4,603,029,983.16/85,734.80
  6. Step 6: Final answer
    x = 53,689.17

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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.