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Finding the Fourth Proportional to 128,231.10, 192,001.05 and 92,979.90

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Solution

The fourth proportional to 128,231.10, 192,001.05 and 92,979.90 is: 139,219.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,231.10 : 192,001.05 = 92,979.90 : x
  2. Step 2: Convert to fraction form
    128,231.10/192,001.05 = 92,979.90/x
  3. Step 3: Cross multiply
    128,231.10x = 192,001.05 × 92,979.90
  4. Step 4: Simplify right side
    128,231.10x = 17,852,238,428.90
  5. Step 5: Solve for x
    x = 17,852,238,428.90/128,231.10
  6. Step 6: Final answer
    x = 139,219.26

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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.