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Finding the Fourth Proportional to 84,603.32, 126,905.27 and 21,423.41

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Solution

The fourth proportional to 84,603.32, 126,905.27 and 21,423.41 is: 32,135.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,603.32 : 126,905.27 = 21,423.41 : x
  2. Step 2: Convert to fraction form
    84,603.32/126,905.27 = 21,423.41/x
  3. Step 3: Cross multiply
    84,603.32x = 126,905.27 × 21,423.41
  4. Step 4: Simplify right side
    84,603.32x = 2,718,743,840.52
  5. Step 5: Solve for x
    x = 2,718,743,840.52/84,603.32
  6. Step 6: Final answer
    x = 32,135.19

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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.