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Finding the Fourth Proportional to 213,223.76, 319,834.07 and 86,834.30

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Solution

The fourth proportional to 213,223.76, 319,834.07 and 86,834.30 is: 130,250.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,223.76 : 319,834.07 = 86,834.30 : x
  2. Step 2: Convert to fraction form
    213,223.76/319,834.07 = 86,834.30/x
  3. Step 3: Cross multiply
    213,223.76x = 319,834.07 × 86,834.30
  4. Step 4: Simplify right side
    213,223.76x = 27,772,565,876.89
  5. Step 5: Solve for x
    x = 27,772,565,876.89/213,223.76
  6. Step 6: Final answer
    x = 130,250.80

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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.