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Finding the Fourth Proportional to 212,798.01, 319,246.70 and 72,556.77

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Solution

The fourth proportional to 212,798.01, 319,246.70 and 72,556.77 is: 108,852.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,798.01 : 319,246.70 = 72,556.77 : x
  2. Step 2: Convert to fraction form
    212,798.01/319,246.70 = 72,556.77/x
  3. Step 3: Cross multiply
    212,798.01x = 319,246.70 × 72,556.77
  4. Step 4: Simplify right side
    212,798.01x = 23,163,509,022.38
  5. Step 5: Solve for x
    x = 23,163,509,022.38/212,798.01
  6. Step 6: Final answer
    x = 108,852.09

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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.