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Finding the Fourth Proportional to 99,710.75, 149,664.65 and 43,589.59

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Solution

The fourth proportional to 99,710.75, 149,664.65 and 43,589.59 is: 65,427.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,710.75 : 149,664.65 = 43,589.59 : x
  2. Step 2: Convert to fraction form
    99,710.75/149,664.65 = 43,589.59/x
  3. Step 3: Cross multiply
    99,710.75x = 149,664.65 × 43,589.59
  4. Step 4: Simplify right side
    99,710.75x = 6,523,820,730.99
  5. Step 5: Solve for x
    x = 6,523,820,730.99/99,710.75
  6. Step 6: Final answer
    x = 65,427.46

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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.