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Finding the Fourth Proportional to 235,988.88, 325,663.20 and 128,558.64

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Solution

The fourth proportional to 235,988.88, 325,663.20 and 128,558.64 is: 177,410.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,988.88 : 325,663.20 = 128,558.64 : x
  2. Step 2: Convert to fraction form
    235,988.88/325,663.20 = 128,558.64/x
  3. Step 3: Cross multiply
    235,988.88x = 325,663.20 × 128,558.64
  4. Step 4: Simplify right side
    235,988.88x = 41,866,818,090.05
  5. Step 5: Solve for x
    x = 41,866,818,090.05/235,988.88
  6. Step 6: Final answer
    x = 177,410.13

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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.