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Finding the Fourth Proportional to 84,805.61, 127,226.87 and 25,639.75

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Solution

The fourth proportional to 84,805.61, 127,226.87 and 25,639.75 is: 38,465.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,805.61 : 127,226.87 = 25,639.75 : x
  2. Step 2: Convert to fraction form
    84,805.61/127,226.87 = 25,639.75/x
  3. Step 3: Cross multiply
    84,805.61x = 127,226.87 × 25,639.75
  4. Step 4: Simplify right side
    84,805.61x = 3,262,064,886.11
  5. Step 5: Solve for x
    x = 3,262,064,886.11/84,805.61
  6. Step 6: Final answer
    x = 38,465.20

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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.