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Finding the Fourth Proportional to 235,783.66, 325,381.45 and 128,354.48

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Solution

The fourth proportional to 235,783.66, 325,381.45 and 128,354.48 is: 177,129.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,783.66 : 325,381.45 = 128,354.48 : x
  2. Step 2: Convert to fraction form
    235,783.66/325,381.45 = 128,354.48/x
  3. Step 3: Cross multiply
    235,783.66x = 325,381.45 × 128,354.48
  4. Step 4: Simplify right side
    235,783.66x = 41,764,166,816.40
  5. Step 5: Solve for x
    x = 41,764,166,816.40/235,783.66
  6. Step 6: Final answer
    x = 177,129.18

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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.