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Finding the Fourth Proportional to 85,078.66, 127,580.98 and 25,900.47

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Solution

The fourth proportional to 85,078.66, 127,580.98 and 25,900.47 is: 38,839.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,078.66 : 127,580.98 = 25,900.47 : x
  2. Step 2: Convert to fraction form
    85,078.66/127,580.98 = 25,900.47/x
  3. Step 3: Cross multiply
    85,078.66x = 127,580.98 × 25,900.47
  4. Step 4: Simplify right side
    85,078.66x = 3,304,407,345.06
  5. Step 5: Solve for x
    x = 3,304,407,345.06/85,078.66
  6. Step 6: Final answer
    x = 38,839.44

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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.