Home / 280,086,811.40-420,130,217.10-142,337,304.20

Finding the Fourth Proportional to 280,086,811.40, 420,130,217.10 and 142,337,304.20

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Solution

The fourth proportional to 280,086,811.40, 420,130,217.10 and 142,337,304.20 is: 213,505,956.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,086,811.40 : 420,130,217.10 = 142,337,304.20 : x
  2. Step 2: Convert to fraction form
    280,086,811.40/420,130,217.10 = 142,337,304.20/x
  3. Step 3: Cross multiply
    280,086,811.40x = 420,130,217.10 × 142,337,304.20
  4. Step 4: Simplify right side
    280,086,811.40x = 59,800,202,514,974,744
  5. Step 5: Solve for x
    x = 59,800,202,514,974,744/280,086,811.40
  6. Step 6: Final answer
    x = 213,505,956.30

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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.