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Finding the Fourth Proportional to 169,981.60, 254,972.40 and 81,408.10

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Solution

The fourth proportional to 169,981.60, 254,972.40 and 81,408.10 is: 122,112.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,981.60 : 254,972.40 = 81,408.10 : x
  2. Step 2: Convert to fraction form
    169,981.60/254,972.40 = 81,408.10/x
  3. Step 3: Cross multiply
    169,981.60x = 254,972.40 × 81,408.10
  4. Step 4: Simplify right side
    169,981.60x = 20,756,818,636.44
  5. Step 5: Solve for x
    x = 20,756,818,636.44/169,981.60
  6. Step 6: Final answer
    x = 122,112.15

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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.