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Finding the Fourth Proportional to 85,715.71, 128,593.95 and 35,768.05

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Solution

The fourth proportional to 85,715.71, 128,593.95 and 35,768.05 is: 53,660.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,715.71 : 128,593.95 = 35,768.05 : x
  2. Step 2: Convert to fraction form
    85,715.71/128,593.95 = 35,768.05/x
  3. Step 3: Cross multiply
    85,715.71x = 128,593.95 × 35,768.05
  4. Step 4: Simplify right side
    85,715.71x = 4,599,554,833.30
  5. Step 5: Solve for x
    x = 4,599,554,833.30/85,715.71
  6. Step 6: Final answer
    x = 53,660.58

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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.