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Finding the Fourth Proportional to 165,624.40, 248,436.60 and 128,299.60

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Solution

The fourth proportional to 165,624.40, 248,436.60 and 128,299.60 is: 192,449.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    165,624.40 : 248,436.60 = 128,299.60 : x
  2. Step 2: Convert to fraction form
    165,624.40/248,436.60 = 128,299.60/x
  3. Step 3: Cross multiply
    165,624.40x = 248,436.60 × 128,299.60
  4. Step 4: Simplify right side
    165,624.40x = 31,874,316,405.36
  5. Step 5: Solve for x
    x = 31,874,316,405.36/165,624.40
  6. Step 6: Final answer
    x = 192,449.40

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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.