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Finding the Fourth Proportional to 420,012.79, 630,017.99 and 104,469.70

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Solution

The fourth proportional to 420,012.79, 630,017.99 and 104,469.70 is: 156,704.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,012.79 : 630,017.99 = 104,469.70 : x
  2. Step 2: Convert to fraction form
    420,012.79/630,017.99 = 104,469.70/x
  3. Step 3: Cross multiply
    420,012.79x = 630,017.99 × 104,469.70
  4. Step 4: Simplify right side
    420,012.79x = 65,817,786,737.46
  5. Step 5: Solve for x
    x = 65,817,786,737.46/420,012.79
  6. Step 6: Final answer
    x = 156,704.24

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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.