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Finding the Fourth Proportional to 86,873.40, 130,310.10 and 53,485.20

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Solution

The fourth proportional to 86,873.40, 130,310.10 and 53,485.20 is: 80,227.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,873.40 : 130,310.10 = 53,485.20 : x
  2. Step 2: Convert to fraction form
    86,873.40/130,310.10 = 53,485.20/x
  3. Step 3: Cross multiply
    86,873.40x = 130,310.10 × 53,485.20
  4. Step 4: Simplify right side
    86,873.40x = 6,969,661,760.52
  5. Step 5: Solve for x
    x = 6,969,661,760.52/86,873.40
  6. Step 6: Final answer
    x = 80,227.80

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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.