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Finding the Fourth Proportional to 425,006.15, 637,407.16 and 125,405.78

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Solution

The fourth proportional to 425,006.15, 637,407.16 and 125,405.78 is: 188,078.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,006.15 : 637,407.16 = 125,405.78 : x
  2. Step 2: Convert to fraction form
    425,006.15/637,407.16 = 125,405.78/x
  3. Step 3: Cross multiply
    425,006.15x = 637,407.16 × 125,405.78
  4. Step 4: Simplify right side
    425,006.15x = 79,934,538,576.83
  5. Step 5: Solve for x
    x = 79,934,538,576.83/425,006.15
  6. Step 6: Final answer
    x = 188,078.55

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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.