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Finding the Fourth Proportional to 235,709.17, 325,272.40 and 128,276.89

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Solution

The fourth proportional to 235,709.17, 325,272.40 and 128,276.89 is: 177,018.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,709.17 : 325,272.40 = 128,276.89 : x
  2. Step 2: Convert to fraction form
    235,709.17/325,272.40 = 128,276.89/x
  3. Step 3: Cross multiply
    235,709.17x = 325,272.40 × 128,276.89
  4. Step 4: Simplify right side
    235,709.17x = 41,724,930,740.96
  5. Step 5: Solve for x
    x = 41,724,930,740.96/235,709.17
  6. Step 6: Final answer
    x = 177,018.70

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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.