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Finding the Fourth Proportional to 99,541.20, 149,311.80 and 86,710.80

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Solution

The fourth proportional to 99,541.20, 149,311.80 and 86,710.80 is: 130,066.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,541.20 : 149,311.80 = 86,710.80 : x
  2. Step 2: Convert to fraction form
    99,541.20/149,311.80 = 86,710.80/x
  3. Step 3: Cross multiply
    99,541.20x = 149,311.80 × 86,710.80
  4. Step 4: Simplify right side
    99,541.20x = 12,946,945,627.44
  5. Step 5: Solve for x
    x = 12,946,945,627.44/99,541.20
  6. Step 6: Final answer
    x = 130,066.20

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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.