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Finding the Fourth Proportional to 85,727.40, 128,491.74 and 50,696.52

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Solution

The fourth proportional to 85,727.40, 128,491.74 and 50,696.52 is: 75,986.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,727.40 : 128,491.74 = 50,696.52 : x
  2. Step 2: Convert to fraction form
    85,727.40/128,491.74 = 50,696.52/x
  3. Step 3: Cross multiply
    85,727.40x = 128,491.74 × 50,696.52
  4. Step 4: Simplify right side
    85,727.40x = 6,514,084,066.74
  5. Step 5: Solve for x
    x = 6,514,084,066.74/85,727.40
  6. Step 6: Final answer
    x = 75,986.02

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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.