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Finding the Fourth Proportional to 270,607.80, 405,969.30 and 83,638.20

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Solution

The fourth proportional to 270,607.80, 405,969.30 and 83,638.20 is: 125,475.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,607.80 : 405,969.30 = 83,638.20 : x
  2. Step 2: Convert to fraction form
    270,607.80/405,969.30 = 83,638.20/x
  3. Step 3: Cross multiply
    270,607.80x = 405,969.30 × 83,638.20
  4. Step 4: Simplify right side
    270,607.80x = 33,954,541,507.26
  5. Step 5: Solve for x
    x = 33,954,541,507.26/270,607.80
  6. Step 6: Final answer
    x = 125,475.10

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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.