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Finding the Fourth Proportional to 86,810.80, 130,190.60 and 34,202.80

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Solution

The fourth proportional to 86,810.80, 130,190.60 and 34,202.80 is: 51,294.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,810.80 : 130,190.60 = 34,202.80 : x
  2. Step 2: Convert to fraction form
    86,810.80/130,190.60 = 34,202.80/x
  3. Step 3: Cross multiply
    86,810.80x = 130,190.60 × 34,202.80
  4. Step 4: Simplify right side
    86,810.80x = 4,452,883,053.68
  5. Step 5: Solve for x
    x = 4,452,883,053.68/86,810.80
  6. Step 6: Final answer
    x = 51,294.11

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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.