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Finding the Fourth Proportional to 315,221.40, 472,861.80 and 125,636.04

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Solution

The fourth proportional to 315,221.40, 472,861.80 and 125,636.04 is: 188,465.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,221.40 : 472,861.80 = 125,636.04 : x
  2. Step 2: Convert to fraction form
    315,221.40/472,861.80 = 125,636.04/x
  3. Step 3: Cross multiply
    315,221.40x = 472,861.80 × 125,636.04
  4. Step 4: Simplify right side
    315,221.40x = 59,408,484,019.27
  5. Step 5: Solve for x
    x = 59,408,484,019.27/315,221.40
  6. Step 6: Final answer
    x = 188,465.90

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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.