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Finding the Fourth Proportional to 128,442.40, 193,124.40 and 108,167.20

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Solution

The fourth proportional to 128,442.40, 193,124.40 and 108,167.20 is: 162,638.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,442.40 : 193,124.40 = 108,167.20 : x
  2. Step 2: Convert to fraction form
    128,442.40/193,124.40 = 108,167.20/x
  3. Step 3: Cross multiply
    128,442.40x = 193,124.40 × 108,167.20
  4. Step 4: Simplify right side
    128,442.40x = 20,889,725,599.68
  5. Step 5: Solve for x
    x = 20,889,725,599.68/128,442.40
  6. Step 6: Final answer
    x = 162,638.86

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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.