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Finding the Fourth Proportional to 103,954.40, 155,672.40 and 83,218.40

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Solution

The fourth proportional to 103,954.40, 155,672.40 and 83,218.40 is: 124,620.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,954.40 : 155,672.40 = 83,218.40 : x
  2. Step 2: Convert to fraction form
    103,954.40/155,672.40 = 83,218.40/x
  3. Step 3: Cross multiply
    103,954.40x = 155,672.40 × 83,218.40
  4. Step 4: Simplify right side
    103,954.40x = 12,954,808,052.16
  5. Step 5: Solve for x
    x = 12,954,808,052.16/103,954.40
  6. Step 6: Final answer
    x = 124,620.10

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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.