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Finding the Fourth Proportional to 420,011.91, 630,016.67 and 104,468.82

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Solution

The fourth proportional to 420,011.91, 630,016.67 and 104,468.82 is: 156,702.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,011.91 : 630,016.67 = 104,468.82 : x
  2. Step 2: Convert to fraction form
    420,011.91/630,016.67 = 104,468.82/x
  3. Step 3: Cross multiply
    420,011.91x = 630,016.67 × 104,468.82
  4. Step 4: Simplify right side
    420,011.91x = 65,817,098,356.40
  5. Step 5: Solve for x
    x = 65,817,098,356.40/420,011.91
  6. Step 6: Final answer
    x = 156,702.93

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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.