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Finding the Fourth Proportional to 84,872.70, 127,276.65 and 25,688.70

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Solution

The fourth proportional to 84,872.70, 127,276.65 and 25,688.70 is: 38,523.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,872.70 : 127,276.65 = 25,688.70 : x
  2. Step 2: Convert to fraction form
    84,872.70/127,276.65 = 25,688.70/x
  3. Step 3: Cross multiply
    84,872.70x = 127,276.65 × 25,688.70
  4. Step 4: Simplify right side
    84,872.70x = 3,269,571,678.86
  5. Step 5: Solve for x
    x = 3,269,571,678.86/84,872.70
  6. Step 6: Final answer
    x = 38,523.24

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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.