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Finding the Fourth Proportional to 235,834.76, 325,459.95 and 128,408.96

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Solution

The fourth proportional to 235,834.76, 325,459.95 and 128,408.96 is: 177,208.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,834.76 : 325,459.95 = 128,408.96 : x
  2. Step 2: Convert to fraction form
    235,834.76/325,459.95 = 128,408.96/x
  3. Step 3: Cross multiply
    235,834.76x = 325,459.95 × 128,408.96
  4. Step 4: Simplify right side
    235,834.76x = 41,791,973,701.15
  5. Step 5: Solve for x
    x = 41,791,973,701.15/235,834.76
  6. Step 6: Final answer
    x = 177,208.71

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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.