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Finding the Fourth Proportional to 84,814.60, 127,221.90 and 53,787.40

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Solution

The fourth proportional to 84,814.60, 127,221.90 and 53,787.40 is: 80,681.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,814.60 : 127,221.90 = 53,787.40 : x
  2. Step 2: Convert to fraction form
    84,814.60/127,221.90 = 53,787.40/x
  3. Step 3: Cross multiply
    84,814.60x = 127,221.90 × 53,787.40
  4. Step 4: Simplify right side
    84,814.60x = 6,842,935,224.06
  5. Step 5: Solve for x
    x = 6,842,935,224.06/84,814.60
  6. Step 6: Final answer
    x = 80,681.10

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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.