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Finding the Fourth Proportional to 259,637.70, 389,630.70 and 91,157.70

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Solution

The fourth proportional to 259,637.70, 389,630.70 and 91,157.70 is: 136,797.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,637.70 : 389,630.70 = 91,157.70 : x
  2. Step 2: Convert to fraction form
    259,637.70/389,630.70 = 91,157.70/x
  3. Step 3: Cross multiply
    259,637.70x = 389,630.70 × 91,157.70
  4. Step 4: Simplify right side
    259,637.70x = 35,517,838,461.39
  5. Step 5: Solve for x
    x = 35,517,838,461.39/259,637.70
  6. Step 6: Final answer
    x = 136,797.69

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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.