Home / 212,549.37-318,818.73-86,155.80

Finding the Fourth Proportional to 212,549.37, 318,818.73 and 86,155.80

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Solution

The fourth proportional to 212,549.37, 318,818.73 and 86,155.80 is: 129,231.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,549.37 : 318,818.73 = 86,155.80 : x
  2. Step 2: Convert to fraction form
    212,549.37/318,818.73 = 86,155.80/x
  3. Step 3: Cross multiply
    212,549.37x = 318,818.73 × 86,155.80
  4. Step 4: Simplify right side
    212,549.37x = 27,468,083,659.00
  5. Step 5: Solve for x
    x = 27,468,083,659.00/212,549.37
  6. Step 6: Final answer
    x = 129,231.55

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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.