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Finding the Fourth Proportional to 235,707.72, 325,270.42 and 128,275.45

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Solution

The fourth proportional to 235,707.72, 325,270.42 and 128,275.45 is: 177,016.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,707.72 : 325,270.42 = 128,275.45 : x
  2. Step 2: Convert to fraction form
    235,707.72/325,270.42 = 128,275.45/x
  3. Step 3: Cross multiply
    235,707.72x = 325,270.42 × 128,275.45
  4. Step 4: Simplify right side
    235,707.72x = 41,724,209,497.19
  5. Step 5: Solve for x
    x = 41,724,209,497.19/235,707.72
  6. Step 6: Final answer
    x = 177,016.73

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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.