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Finding the Fourth Proportional to 225,394.72, 311,030.96 and 123,421.39

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Solution

The fourth proportional to 225,394.72, 311,030.96 and 123,421.39 is: 170,313.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,394.72 : 311,030.96 = 123,421.39 : x
  2. Step 2: Convert to fraction form
    225,394.72/311,030.96 = 123,421.39/x
  3. Step 3: Cross multiply
    225,394.72x = 311,030.96 × 123,421.39
  4. Step 4: Simplify right side
    225,394.72x = 38,387,872,021.55
  5. Step 5: Solve for x
    x = 38,387,872,021.55/225,394.72
  6. Step 6: Final answer
    x = 170,313.98

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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.