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Finding the Fourth Proportional to 138,025.20, 207,037.80 and 103,033.20

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Solution

The fourth proportional to 138,025.20, 207,037.80 and 103,033.20 is: 154,549.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,025.20 : 207,037.80 = 103,033.20 : x
  2. Step 2: Convert to fraction form
    138,025.20/207,037.80 = 103,033.20/x
  3. Step 3: Cross multiply
    138,025.20x = 207,037.80 × 103,033.20
  4. Step 4: Simplify right side
    138,025.20x = 21,331,767,054.96
  5. Step 5: Solve for x
    x = 21,331,767,054.96/138,025.20
  6. Step 6: Final answer
    x = 154,549.80

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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.