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Finding the Fourth Proportional to 192,990.30, 289,312.65 and 126,462.30

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Solution

The fourth proportional to 192,990.30, 289,312.65 and 126,462.30 is: 189,580.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    192,990.30 : 289,312.65 = 126,462.30 : x
  2. Step 2: Convert to fraction form
    192,990.30/289,312.65 = 126,462.30/x
  3. Step 3: Cross multiply
    192,990.30x = 289,312.65 × 126,462.30
  4. Step 4: Simplify right side
    192,990.30x = 36,587,143,138.10
  5. Step 5: Solve for x
    x = 36,587,143,138.10/192,990.30
  6. Step 6: Final answer
    x = 189,580.22

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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.