Home / 212,219.40-318,332.58-71,981.64

Finding the Fourth Proportional to 212,219.40, 318,332.58 and 71,981.64

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Solution

The fourth proportional to 212,219.40, 318,332.58 and 71,981.64 is: 107,973.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,219.40 : 318,332.58 = 71,981.64 : x
  2. Step 2: Convert to fraction form
    212,219.40/318,332.58 = 71,981.64/x
  3. Step 3: Cross multiply
    212,219.40x = 318,332.58 × 71,981.64
  4. Step 4: Simplify right side
    212,219.40x = 22,914,101,173.83
  5. Step 5: Solve for x
    x = 22,914,101,173.83/212,219.40
  6. Step 6: Final answer
    x = 107,973.64

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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.