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Finding the Fourth Proportional to 420,329.72, 630,468.96 and 136,014.20

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Solution

The fourth proportional to 420,329.72, 630,468.96 and 136,014.20 is: 204,013.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,329.72 : 630,468.96 = 136,014.20 : x
  2. Step 2: Convert to fraction form
    420,329.72/630,468.96 = 136,014.20/x
  3. Step 3: Cross multiply
    420,329.72x = 630,468.96 × 136,014.20
  4. Step 4: Simplify right side
    420,329.72x = 85,752,731,219.23
  5. Step 5: Solve for x
    x = 85,752,731,219.23/420,329.72
  6. Step 6: Final answer
    x = 204,013.01

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1.5x scale

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.