Home / 420,679,766.70-630,989,756.47-129,516,528.82

Finding the Fourth Proportional to 420,679,766.70, 630,989,756.47 and 129,516,528.82

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Solution

The fourth proportional to 420,679,766.70, 630,989,756.47 and 129,516,528.82 is: 194,265,589.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,679,766.70 : 630,989,756.47 = 129,516,528.82 : x
  2. Step 2: Convert to fraction form
    420,679,766.70/630,989,756.47 = 129,516,528.82/x
  3. Step 3: Cross multiply
    420,679,766.70x = 630,989,756.47 × 129,516,528.82
  4. Step 4: Simplify right side
    420,679,766.70x = 81,723,602,978,971,536
  5. Step 5: Solve for x
    x = 81,723,602,978,971,536/420,679,766.70
  6. Step 6: Final answer
    x = 194,265,589.76

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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.