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Finding the Fourth Proportional to 159,617.90, 239,426.85 and 128,513.90

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Solution

The fourth proportional to 159,617.90, 239,426.85 and 128,513.90 is: 192,770.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,617.90 : 239,426.85 = 128,513.90 : x
  2. Step 2: Convert to fraction form
    159,617.90/239,426.85 = 128,513.90/x
  3. Step 3: Cross multiply
    159,617.90x = 239,426.85 × 128,513.90
  4. Step 4: Simplify right side
    159,617.90x = 30,769,678,258.22
  5. Step 5: Solve for x
    x = 30,769,678,258.22/159,617.90
  6. Step 6: Final answer
    x = 192,770.85

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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.