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Finding the Fourth Proportional to 215,999.90, 323,999.85 and 109,711.70

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Solution

The fourth proportional to 215,999.90, 323,999.85 and 109,711.70 is: 164,567.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,999.90 : 323,999.85 = 109,711.70 : x
  2. Step 2: Convert to fraction form
    215,999.90/323,999.85 = 109,711.70/x
  3. Step 3: Cross multiply
    215,999.90x = 323,999.85 × 109,711.70
  4. Step 4: Simplify right side
    215,999.90x = 35,546,574,343.25
  5. Step 5: Solve for x
    x = 35,546,574,343.25/215,999.90
  6. Step 6: Final answer
    x = 164,567.55

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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.