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Finding the Fourth Proportional to 115,872.20, 162,571 and 115,872.20

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Solution

The fourth proportional to 115,872.20, 162,571 and 115,872.20 is: 162,571

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,872.20 : 162,571 = 115,872.20 : x
  2. Step 2: Convert to fraction form
    115,872.20/162,571 = 115,872.20/x
  3. Step 3: Cross multiply
    115,872.20x = 162,571 × 115,872.20
  4. Step 4: Simplify right side
    115,872.20x = 18,837,459,426.20
  5. Step 5: Solve for x
    x = 18,837,459,426.20/115,872.20
  6. Step 6: Final answer
    x = 162,571

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.