Home / 212,487.40-318,742.62-79,402.60

Finding the Fourth Proportional to 212,487.40, 318,742.62 and 79,402.60

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Solution

The fourth proportional to 212,487.40, 318,742.62 and 79,402.60 is: 119,108.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,487.40 : 318,742.62 = 79,402.60 : x
  2. Step 2: Convert to fraction form
    212,487.40/318,742.62 = 79,402.60/x
  3. Step 3: Cross multiply
    212,487.40x = 318,742.62 × 79,402.60
  4. Step 4: Simplify right side
    212,487.40x = 25,308,992,758.81
  5. Step 5: Solve for x
    x = 25,308,992,758.81/212,487.40
  6. Step 6: Final answer
    x = 119,108.20

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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.