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Finding the Fourth Proportional to 128,230.60, 192,000.30 and 92,979.40

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Solution

The fourth proportional to 128,230.60, 192,000.30 and 92,979.40 is: 139,218.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,230.60 : 192,000.30 = 92,979.40 : x
  2. Step 2: Convert to fraction form
    128,230.60/192,000.30 = 92,979.40/x
  3. Step 3: Cross multiply
    128,230.60x = 192,000.30 × 92,979.40
  4. Step 4: Simplify right side
    128,230.60x = 17,852,072,693.82
  5. Step 5: Solve for x
    x = 17,852,072,693.82/128,230.60
  6. Step 6: Final answer
    x = 139,218.51

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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.