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Finding the Fourth Proportional to 161,995.20, 242,992.80 and 87,086.40

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Solution

The fourth proportional to 161,995.20, 242,992.80 and 87,086.40 is: 130,629.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,995.20 : 242,992.80 = 87,086.40 : x
  2. Step 2: Convert to fraction form
    161,995.20/242,992.80 = 87,086.40/x
  3. Step 3: Cross multiply
    161,995.20x = 242,992.80 × 87,086.40
  4. Step 4: Simplify right side
    161,995.20x = 21,161,368,177.92
  5. Step 5: Solve for x
    x = 21,161,368,177.92/161,995.20
  6. Step 6: Final answer
    x = 130,629.60

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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.