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Finding the Fourth Proportional to 85,718.72, 128,598.46 and 35,771.06

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Solution

The fourth proportional to 85,718.72, 128,598.46 and 35,771.06 is: 53,665.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,718.72 : 128,598.46 = 35,771.06 : x
  2. Step 2: Convert to fraction form
    85,718.72/128,598.46 = 35,771.06/x
  3. Step 3: Cross multiply
    85,718.72x = 128,598.46 × 35,771.06
  4. Step 4: Simplify right side
    85,718.72x = 4,600,103,228.57
  5. Step 5: Solve for x
    x = 4,600,103,228.57/85,718.72
  6. Step 6: Final answer
    x = 53,665.09

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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.