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Finding the Fourth Proportional to 136,420.60, 204,630.90 and 69,838.60

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Solution

The fourth proportional to 136,420.60, 204,630.90 and 69,838.60 is: 104,757.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,420.60 : 204,630.90 = 69,838.60 : x
  2. Step 2: Convert to fraction form
    136,420.60/204,630.90 = 69,838.60/x
  3. Step 3: Cross multiply
    136,420.60x = 204,630.90 × 69,838.60
  4. Step 4: Simplify right side
    136,420.60x = 14,291,135,572.74
  5. Step 5: Solve for x
    x = 14,291,135,572.74/136,420.60
  6. Step 6: Final answer
    x = 104,757.90

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1.5x scale

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.