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Finding the Fourth Proportional to 86,934.40, 130,363.20 and 40,201.60

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Solution

The fourth proportional to 86,934.40, 130,363.20 and 40,201.60 is: 60,284.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,934.40 : 130,363.20 = 40,201.60 : x
  2. Step 2: Convert to fraction form
    86,934.40/130,363.20 = 40,201.60/x
  3. Step 3: Cross multiply
    86,934.40x = 130,363.20 × 40,201.60
  4. Step 4: Simplify right side
    86,934.40x = 5,240,809,221.12
  5. Step 5: Solve for x
    x = 5,240,809,221.12/86,934.40
  6. Step 6: Final answer
    x = 60,284.64

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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.