Home / 420,679,766.44-630,989,756.10-129,516,528.56

Finding the Fourth Proportional to 420,679,766.44, 630,989,756.10 and 129,516,528.56

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Solution

The fourth proportional to 420,679,766.44, 630,989,756.10 and 129,516,528.56 is: 194,265,589.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,679,766.44 : 630,989,756.10 = 129,516,528.56 : x
  2. Step 2: Convert to fraction form
    420,679,766.44/630,989,756.10 = 129,516,528.56/x
  3. Step 3: Cross multiply
    420,679,766.44x = 630,989,756.10 × 129,516,528.56
  4. Step 4: Simplify right side
    420,679,766.44x = 81,723,602,766,993,088
  5. Step 5: Solve for x
    x = 81,723,602,766,993,088/420,679,766.44
  6. Step 6: Final answer
    x = 194,265,589.38

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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.