Home / 85,685.07-128,304.05-68,953.71

Finding the Fourth Proportional to 85,685.07, 128,304.05 and 68,953.71

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Solution

The fourth proportional to 85,685.07, 128,304.05 and 68,953.71 is: 103,250.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,685.07 : 128,304.05 = 68,953.71 : x
  2. Step 2: Convert to fraction form
    85,685.07/128,304.05 = 68,953.71/x
  3. Step 3: Cross multiply
    85,685.07x = 128,304.05 × 68,953.71
  4. Step 4: Simplify right side
    85,685.07x = 8,847,039,910.76
  5. Step 5: Solve for x
    x = 8,847,039,910.76/85,685.07
  6. Step 6: Final answer
    x = 103,250.66

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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.