Home / 138,127.20-207,190.80-49,383.60

Finding the Fourth Proportional to 138,127.20, 207,190.80 and 49,383.60

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Solution

The fourth proportional to 138,127.20, 207,190.80 and 49,383.60 is: 74,075.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,127.20 : 207,190.80 = 49,383.60 : x
  2. Step 2: Convert to fraction form
    138,127.20/207,190.80 = 49,383.60/x
  3. Step 3: Cross multiply
    138,127.20x = 207,190.80 × 49,383.60
  4. Step 4: Simplify right side
    138,127.20x = 10,231,827,590.88
  5. Step 5: Solve for x
    x = 10,231,827,590.88/138,127.20
  6. Step 6: Final answer
    x = 74,075.40

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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.