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Finding the Fourth Proportional to 145,213.40, 217,720.20 and 73,998.20

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Solution

The fourth proportional to 145,213.40, 217,720.20 and 73,998.20 is: 110,946.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,213.40 : 217,720.20 = 73,998.20 : x
  2. Step 2: Convert to fraction form
    145,213.40/217,720.20 = 73,998.20/x
  3. Step 3: Cross multiply
    145,213.40x = 217,720.20 × 73,998.20
  4. Step 4: Simplify right side
    145,213.40x = 16,110,902,903.64
  5. Step 5: Solve for x
    x = 16,110,902,903.64/145,213.40
  6. Step 6: Final answer
    x = 110,946.39

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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.