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Finding the Fourth Proportional to 128,815.60, 193,223.40 and 105,468.40

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Solution

The fourth proportional to 128,815.60, 193,223.40 and 105,468.40 is: 158,202.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,815.60 : 193,223.40 = 105,468.40 : x
  2. Step 2: Convert to fraction form
    128,815.60/193,223.40 = 105,468.40/x
  3. Step 3: Cross multiply
    128,815.60x = 193,223.40 × 105,468.40
  4. Step 4: Simplify right side
    128,815.60x = 20,378,962,840.56
  5. Step 5: Solve for x
    x = 20,378,962,840.56/128,815.60
  6. Step 6: Final answer
    x = 158,202.60

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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.