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Finding the Fourth Proportional to 159,617.40, 239,426.10 and 128,513.40

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Solution

The fourth proportional to 159,617.40, 239,426.10 and 128,513.40 is: 192,770.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,617.40 : 239,426.10 = 128,513.40 : x
  2. Step 2: Convert to fraction form
    159,617.40/239,426.10 = 128,513.40/x
  3. Step 3: Cross multiply
    159,617.40x = 239,426.10 × 128,513.40
  4. Step 4: Simplify right side
    159,617.40x = 30,769,462,159.74
  5. Step 5: Solve for x
    x = 30,769,462,159.74/159,617.40
  6. Step 6: Final answer
    x = 192,770.10

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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.