Home / 420,443,084.70-630,552,652.65-129,309,644.70

Finding the Fourth Proportional to 420,443,084.70, 630,552,652.65 and 129,309,644.70

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Solution

The fourth proportional to 420,443,084.70, 630,552,652.65 and 129,309,644.70 is: 193,930,028.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,443,084.70 : 630,552,652.65 = 129,309,644.70 : x
  2. Step 2: Convert to fraction form
    420,443,084.70/630,552,652.65 = 129,309,644.70/x
  3. Step 3: Cross multiply
    420,443,084.70x = 630,552,652.65 × 129,309,644.70
  4. Step 4: Simplify right side
    420,443,084.70x = 81,536,539,478,814,016
  5. Step 5: Solve for x
    x = 81,536,539,478,814,016/420,443,084.70
  6. Step 6: Final answer
    x = 193,930,028.69

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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.