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Finding the Fourth Proportional to 235,436.57, 324,915.74 and 128,004.29

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Solution

The fourth proportional to 235,436.57, 324,915.74 and 128,004.29 is: 176,653.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,436.57 : 324,915.74 = 128,004.29 : x
  2. Step 2: Convert to fraction form
    235,436.57/324,915.74 = 128,004.29/x
  3. Step 3: Cross multiply
    235,436.57x = 324,915.74 × 128,004.29
  4. Step 4: Simplify right side
    235,436.57x = 41,590,608,608.52
  5. Step 5: Solve for x
    x = 41,590,608,608.52/235,436.57
  6. Step 6: Final answer
    x = 176,653.14

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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.