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Finding the Fourth Proportional to 86,818.80, 130,033.80 and 71,266.80

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Solution

The fourth proportional to 86,818.80, 130,033.80 and 71,266.80 is: 106,740.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,818.80 : 130,033.80 = 71,266.80 : x
  2. Step 2: Convert to fraction form
    86,818.80/130,033.80 = 71,266.80/x
  3. Step 3: Cross multiply
    86,818.80x = 130,033.80 × 71,266.80
  4. Step 4: Simplify right side
    86,818.80x = 9,267,092,817.84
  5. Step 5: Solve for x
    x = 9,267,092,817.84/86,818.80
  6. Step 6: Final answer
    x = 106,740.62

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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.