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Finding the Fourth Proportional to 124,419.40, 186,629.10 and 77,072.20

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Solution

The fourth proportional to 124,419.40, 186,629.10 and 77,072.20 is: 115,608.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,419.40 : 186,629.10 = 77,072.20 : x
  2. Step 2: Convert to fraction form
    124,419.40/186,629.10 = 77,072.20/x
  3. Step 3: Cross multiply
    124,419.40x = 186,629.10 × 77,072.20
  4. Step 4: Simplify right side
    124,419.40x = 14,383,915,321.02
  5. Step 5: Solve for x
    x = 14,383,915,321.02/124,419.40
  6. Step 6: Final answer
    x = 115,608.30

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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.