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Finding the Fourth Proportional to 235,868.64, 325,506.72 and 128,440.48

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Solution

The fourth proportional to 235,868.64, 325,506.72 and 128,440.48 is: 177,252.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,868.64 : 325,506.72 = 128,440.48 : x
  2. Step 2: Convert to fraction form
    235,868.64/325,506.72 = 128,440.48/x
  3. Step 3: Cross multiply
    235,868.64x = 325,506.72 × 128,440.48
  4. Step 4: Simplify right side
    235,868.64x = 41,808,239,360.03
  5. Step 5: Solve for x
    x = 41,808,239,360.03/235,868.64
  6. Step 6: Final answer
    x = 177,252.22

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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.