Home / 212,455.12-318,485.85-72,115.33

Finding the Fourth Proportional to 212,455.12, 318,485.85 and 72,115.33

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Solution

The fourth proportional to 212,455.12, 318,485.85 and 72,115.33 is: 108,106.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,455.12 : 318,485.85 = 72,115.33 : x
  2. Step 2: Convert to fraction form
    212,455.12/318,485.85 = 72,115.33/x
  3. Step 3: Cross multiply
    212,455.12x = 318,485.85 × 72,115.33
  4. Step 4: Simplify right side
    212,455.12x = 22,967,712,173.08
  5. Step 5: Solve for x
    x = 22,967,712,173.08/212,455.12
  6. Step 6: Final answer
    x = 108,106.18

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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.