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Finding the Fourth Proportional to 210,279.60, 315,221.70 and 103,622.40

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Solution

The fourth proportional to 210,279.60, 315,221.70 and 103,622.40 is: 155,336.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,279.60 : 315,221.70 = 103,622.40 : x
  2. Step 2: Convert to fraction form
    210,279.60/315,221.70 = 103,622.40/x
  3. Step 3: Cross multiply
    210,279.60x = 315,221.70 × 103,622.40
  4. Step 4: Simplify right side
    210,279.60x = 32,664,029,086.08
  5. Step 5: Solve for x
    x = 32,664,029,086.08/210,279.60
  6. Step 6: Final answer
    x = 155,336.18

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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.