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Finding the Fourth Proportional to 402,368.90, 603,553.35 and 136,138.10

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Solution

The fourth proportional to 402,368.90, 603,553.35 and 136,138.10 is: 204,207.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,368.90 : 603,553.35 = 136,138.10 : x
  2. Step 2: Convert to fraction form
    402,368.90/603,553.35 = 136,138.10/x
  3. Step 3: Cross multiply
    402,368.90x = 603,553.35 × 136,138.10
  4. Step 4: Simplify right side
    402,368.90x = 82,166,606,317.64
  5. Step 5: Solve for x
    x = 82,166,606,317.64/402,368.90
  6. Step 6: Final answer
    x = 204,207.15

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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.