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Finding the Fourth Proportional to 420,473.93, 630,773.31 and 136,069.16

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Solution

The fourth proportional to 420,473.93, 630,773.31 and 136,069.16 is: 204,123.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,473.93 : 630,773.31 = 136,069.16 : x
  2. Step 2: Convert to fraction form
    420,473.93/630,773.31 = 136,069.16/x
  3. Step 3: Cross multiply
    420,473.93x = 630,773.31 × 136,069.16
  4. Step 4: Simplify right side
    420,473.93x = 85,828,794,442.12
  5. Step 5: Solve for x
    x = 85,828,794,442.12/420,473.93
  6. Step 6: Final answer
    x = 204,123.94

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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.