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Finding the Fourth Proportional to 138,322.20, 207,483.30 and 103,330.20

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Solution

The fourth proportional to 138,322.20, 207,483.30 and 103,330.20 is: 154,995.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,322.20 : 207,483.30 = 103,330.20 : x
  2. Step 2: Convert to fraction form
    138,322.20/207,483.30 = 103,330.20/x
  3. Step 3: Cross multiply
    138,322.20x = 207,483.30 × 103,330.20
  4. Step 4: Simplify right side
    138,322.20x = 21,439,290,885.66
  5. Step 5: Solve for x
    x = 21,439,290,885.66/138,322.20
  6. Step 6: Final answer
    x = 154,995.30

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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.