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Finding the Fourth Proportional to 126,693.30, 189,930.60 and 64,363.80

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Solution

The fourth proportional to 126,693.30, 189,930.60 and 64,363.80 is: 96,490.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,693.30 : 189,930.60 = 64,363.80 : x
  2. Step 2: Convert to fraction form
    126,693.30/189,930.60 = 64,363.80/x
  3. Step 3: Cross multiply
    126,693.30x = 189,930.60 × 64,363.80
  4. Step 4: Simplify right side
    126,693.30x = 12,224,655,152.28
  5. Step 5: Solve for x
    x = 12,224,655,152.28/126,693.30
  6. Step 6: Final answer
    x = 96,490.15

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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.