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Finding the Fourth Proportional to 81,701.76, 122,563.20 and 29,126.40

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Solution

The fourth proportional to 81,701.76, 122,563.20 and 29,126.40 is: 43,693.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,701.76 : 122,563.20 = 29,126.40 : x
  2. Step 2: Convert to fraction form
    81,701.76/122,563.20 = 29,126.40/x
  3. Step 3: Cross multiply
    81,701.76x = 122,563.20 × 29,126.40
  4. Step 4: Simplify right side
    81,701.76x = 3,569,824,788.48
  5. Step 5: Solve for x
    x = 3,569,824,788.48/81,701.76
  6. Step 6: Final answer
    x = 43,693.36

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1.5x scale

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.