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Finding the Fourth Proportional to 235,861.47, 325,492.71 and 128,433.60

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Solution

The fourth proportional to 235,861.47, 325,492.71 and 128,433.60 is: 177,240.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,861.47 : 325,492.71 = 128,433.60 : x
  2. Step 2: Convert to fraction form
    235,861.47/325,492.71 = 128,433.60/x
  3. Step 3: Cross multiply
    235,861.47x = 325,492.71 × 128,433.60
  4. Step 4: Simplify right side
    235,861.47x = 41,804,200,519.06
  5. Step 5: Solve for x
    x = 41,804,200,519.06/235,861.47
  6. Step 6: Final answer
    x = 177,240.48

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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.