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Finding the Fourth Proportional to 235,981.80, 325,653.28 and 128,551.90

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Solution

The fourth proportional to 235,981.80, 325,653.28 and 128,551.90 is: 177,400.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,981.80 : 325,653.28 = 128,551.90 : x
  2. Step 2: Convert to fraction form
    235,981.80/325,653.28 = 128,551.90/x
  3. Step 3: Cross multiply
    235,981.80x = 325,653.28 × 128,551.90
  4. Step 4: Simplify right side
    235,981.80x = 41,863,347,885.23
  5. Step 5: Solve for x
    x = 41,863,347,885.23/235,981.80
  6. Step 6: Final answer
    x = 177,400.75

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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.