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Finding the Fourth Proportional to 128,468.60, 192,702.90 and 115,346.60

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Solution

The fourth proportional to 128,468.60, 192,702.90 and 115,346.60 is: 173,019.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,468.60 : 192,702.90 = 115,346.60 : x
  2. Step 2: Convert to fraction form
    128,468.60/192,702.90 = 115,346.60/x
  3. Step 3: Cross multiply
    128,468.60x = 192,702.90 × 115,346.60
  4. Step 4: Simplify right side
    128,468.60x = 22,227,624,325.14
  5. Step 5: Solve for x
    x = 22,227,624,325.14/128,468.60
  6. Step 6: Final answer
    x = 173,019.90

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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.