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Finding the Fourth Proportional to 85,287.48, 127,668.78 and 55,641.48

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Solution

The fourth proportional to 85,287.48, 127,668.78 and 55,641.48 is: 83,291.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,287.48 : 127,668.78 = 55,641.48 : x
  2. Step 2: Convert to fraction form
    85,287.48/127,668.78 = 55,641.48/x
  3. Step 3: Cross multiply
    85,287.48x = 127,668.78 × 55,641.48
  4. Step 4: Simplify right side
    85,287.48x = 7,103,679,868.99
  5. Step 5: Solve for x
    x = 7,103,679,868.99/85,287.48
  6. Step 6: Final answer
    x = 83,291.00

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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.