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Finding the Fourth Proportional to 84,898.79, 127,352.55 and 21,719.46

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Solution

The fourth proportional to 84,898.79, 127,352.55 and 21,719.46 is: 32,580.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,898.79 : 127,352.55 = 21,719.46 : x
  2. Step 2: Convert to fraction form
    84,898.79/127,352.55 = 21,719.46/x
  3. Step 3: Cross multiply
    84,898.79x = 127,352.55 × 21,719.46
  4. Step 4: Simplify right side
    84,898.79x = 2,766,028,905.49
  5. Step 5: Solve for x
    x = 2,766,028,905.49/84,898.79
  6. Step 6: Final answer
    x = 32,580.31

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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.