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Finding the Fourth Proportional to 235,990.32, 325,665 and 128,560.40

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Solution

The fourth proportional to 235,990.32, 325,665 and 128,560.40 is: 177,412.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,990.32 : 325,665 = 128,560.40 : x
  2. Step 2: Convert to fraction form
    235,990.32/325,665 = 128,560.40/x
  3. Step 3: Cross multiply
    235,990.32x = 325,665 × 128,560.40
  4. Step 4: Simplify right side
    235,990.32x = 41,867,622,666
  5. Step 5: Solve for x
    x = 41,867,622,666/235,990.32
  6. Step 6: Final answer
    x = 177,412.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.