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Finding the Fourth Proportional to 235,711.89, 325,256.04 and 138,909.51

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Solution

The fourth proportional to 235,711.89, 325,256.04 and 138,909.51 is: 191,679.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,711.89 : 325,256.04 = 138,909.51 : x
  2. Step 2: Convert to fraction form
    235,711.89/325,256.04 = 138,909.51/x
  3. Step 3: Cross multiply
    235,711.89x = 325,256.04 × 138,909.51
  4. Step 4: Simplify right side
    235,711.89x = 45,181,157,140.94
  5. Step 5: Solve for x
    x = 45,181,157,140.94/235,711.89
  6. Step 6: Final answer
    x = 191,679.58

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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.