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Finding the Fourth Proportional to 235,871.06, 325,492.29 and 128,440.76

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Solution

The fourth proportional to 235,871.06, 325,492.29 and 128,440.76 is: 177,242.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,871.06 : 325,492.29 = 128,440.76 : x
  2. Step 2: Convert to fraction form
    235,871.06/325,492.29 = 128,440.76/x
  3. Step 3: Cross multiply
    235,871.06x = 325,492.29 × 128,440.76
  4. Step 4: Simplify right side
    235,871.06x = 41,806,475,474.28
  5. Step 5: Solve for x
    x = 41,806,475,474.28/235,871.06
  6. Step 6: Final answer
    x = 177,242.92

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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.