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Finding the Fourth Proportional to 138,032.20, 207,048.30 and 103,040.20

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Solution

The fourth proportional to 138,032.20, 207,048.30 and 103,040.20 is: 154,560.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,032.20 : 207,048.30 = 103,040.20 : x
  2. Step 2: Convert to fraction form
    138,032.20/207,048.30 = 103,040.20/x
  3. Step 3: Cross multiply
    138,032.20x = 207,048.30 × 103,040.20
  4. Step 4: Simplify right side
    138,032.20x = 21,334,298,241.66
  5. Step 5: Solve for x
    x = 21,334,298,241.66/138,032.20
  6. Step 6: Final answer
    x = 154,560.30

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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.