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Finding the Fourth Proportional to 212,633.60, 318,556.80 and 123,929.60

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Solution

The fourth proportional to 212,633.60, 318,556.80 and 123,929.60 is: 185,665.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,633.60 : 318,556.80 = 123,929.60 : x
  2. Step 2: Convert to fraction form
    212,633.60/318,556.80 = 123,929.60/x
  3. Step 3: Cross multiply
    212,633.60x = 318,556.80 × 123,929.60
  4. Step 4: Simplify right side
    212,633.60x = 39,478,616,801.28
  5. Step 5: Solve for x
    x = 39,478,616,801.28/212,633.60
  6. Step 6: Final answer
    x = 185,665.00

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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.