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Finding the Fourth Proportional to 225,615.68, 311,316 and 139,661.12

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Solution

The fourth proportional to 225,615.68, 311,316 and 139,661.12 is: 192,711.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,615.68 : 311,316 = 139,661.12 : x
  2. Step 2: Convert to fraction form
    225,615.68/311,316 = 139,661.12/x
  3. Step 3: Cross multiply
    225,615.68x = 311,316 × 139,661.12
  4. Step 4: Simplify right side
    225,615.68x = 43,478,741,233.92
  5. Step 5: Solve for x
    x = 43,478,741,233.92/225,615.68
  6. Step 6: Final answer
    x = 192,711.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.