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Finding the Fourth Proportional to 99,583.80, 149,402.10 and 43,399.80

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Solution

The fourth proportional to 99,583.80, 149,402.10 and 43,399.80 is: 65,111.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,583.80 : 149,402.10 = 43,399.80 : x
  2. Step 2: Convert to fraction form
    99,583.80/149,402.10 = 43,399.80/x
  3. Step 3: Cross multiply
    99,583.80x = 149,402.10 × 43,399.80
  4. Step 4: Simplify right side
    99,583.80x = 6,484,021,259.58
  5. Step 5: Solve for x
    x = 6,484,021,259.58/99,583.80
  6. Step 6: Final answer
    x = 65,111.21

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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.