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Finding the Fourth Proportional to 212,070.36, 318,105.60 and 99,668.04

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Solution

The fourth proportional to 212,070.36, 318,105.60 and 99,668.04 is: 149,502.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,070.36 : 318,105.60 = 99,668.04 : x
  2. Step 2: Convert to fraction form
    212,070.36/318,105.60 = 99,668.04/x
  3. Step 3: Cross multiply
    212,070.36x = 318,105.60 × 99,668.04
  4. Step 4: Simplify right side
    212,070.36x = 31,704,961,665.02
  5. Step 5: Solve for x
    x = 31,704,961,665.02/212,070.36
  6. Step 6: Final answer
    x = 149,502.09

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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.