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Finding the Fourth Proportional to 404,017.80, 606,026.70 and 138,078.60

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Solution

The fourth proportional to 404,017.80, 606,026.70 and 138,078.60 is: 207,117.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,017.80 : 606,026.70 = 138,078.60 : x
  2. Step 2: Convert to fraction form
    404,017.80/606,026.70 = 138,078.60/x
  3. Step 3: Cross multiply
    404,017.80x = 606,026.70 × 138,078.60
  4. Step 4: Simplify right side
    404,017.80x = 83,679,318,298.62
  5. Step 5: Solve for x
    x = 83,679,318,298.62/404,017.80
  6. Step 6: Final answer
    x = 207,117.90

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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.