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Finding the Fourth Proportional to 170,688.64, 255,991.68 and 75,866.56

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Solution

The fourth proportional to 170,688.64, 255,991.68 and 75,866.56 is: 113,781.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,688.64 : 255,991.68 = 75,866.56 : x
  2. Step 2: Convert to fraction form
    170,688.64/255,991.68 = 75,866.56/x
  3. Step 3: Cross multiply
    170,688.64x = 255,991.68 × 75,866.56
  4. Step 4: Simplify right side
    170,688.64x = 19,421,208,150.22
  5. Step 5: Solve for x
    x = 19,421,208,150.22/170,688.64
  6. Step 6: Final answer
    x = 113,781.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.