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Finding the Fourth Proportional to 259,617.69, 389,429.64 and 91,142.91

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Solution

The fourth proportional to 259,617.69, 389,429.64 and 91,142.91 is: 136,715.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,617.69 : 389,429.64 = 91,142.91 : x
  2. Step 2: Convert to fraction form
    259,617.69/389,429.64 = 91,142.91/x
  3. Step 3: Cross multiply
    259,617.69x = 389,429.64 × 91,142.91
  4. Step 4: Simplify right side
    259,617.69x = 35,493,750,629.85
  5. Step 5: Solve for x
    x = 35,493,750,629.85/259,617.69
  6. Step 6: Final answer
    x = 136,715.46

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1.5x scale

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.