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Finding the Fourth Proportional to 213,079.90, 319,536.72 and 79,887.46

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Solution

The fourth proportional to 213,079.90, 319,536.72 and 79,887.46 is: 119,800.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,079.90 : 319,536.72 = 79,887.46 : x
  2. Step 2: Convert to fraction form
    213,079.90/319,536.72 = 79,887.46/x
  3. Step 3: Cross multiply
    213,079.90x = 319,536.72 × 79,887.46
  4. Step 4: Simplify right side
    213,079.90x = 25,526,976,937.53
  5. Step 5: Solve for x
    x = 25,526,976,937.53/213,079.90
  6. Step 6: Final answer
    x = 119,800.02

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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.