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Finding the Fourth Proportional to 84,898.60, 127,331.43 and 80,683.90

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Solution

The fourth proportional to 84,898.60, 127,331.43 and 80,683.90 is: 121,010.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,898.60 : 127,331.43 = 80,683.90 : x
  2. Step 2: Convert to fraction form
    84,898.60/127,331.43 = 80,683.90/x
  3. Step 3: Cross multiply
    84,898.60x = 127,331.43 × 80,683.90
  4. Step 4: Simplify right side
    84,898.60x = 10,273,596,364.98
  5. Step 5: Solve for x
    x = 10,273,596,364.98/84,898.60
  6. Step 6: Final answer
    x = 121,010.20

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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.