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Finding the Fourth Proportional to 86,810.60, 130,230.30 and 34,221.80

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Solution

The fourth proportional to 86,810.60, 130,230.30 and 34,221.80 is: 51,338.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,810.60 : 130,230.30 = 34,221.80 : x
  2. Step 2: Convert to fraction form
    86,810.60/130,230.30 = 34,221.80/x
  3. Step 3: Cross multiply
    86,810.60x = 130,230.30 × 34,221.80
  4. Step 4: Simplify right side
    86,810.60x = 4,456,715,280.54
  5. Step 5: Solve for x
    x = 4,456,715,280.54/86,810.60
  6. Step 6: Final answer
    x = 51,338.38

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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.