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Finding the Fourth Proportional to 99,680.48, 149,619.12 and 43,559.32

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Solution

The fourth proportional to 99,680.48, 149,619.12 and 43,559.32 is: 65,381.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,680.48 : 149,619.12 = 43,559.32 : x
  2. Step 2: Convert to fraction form
    99,680.48/149,619.12 = 43,559.32/x
  3. Step 3: Cross multiply
    99,680.48x = 149,619.12 × 43,559.32
  4. Step 4: Simplify right side
    99,680.48x = 6,517,307,126.20
  5. Step 5: Solve for x
    x = 6,517,307,126.20/99,680.48
  6. Step 6: Final answer
    x = 65,381.98

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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.