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Finding the Fourth Proportional to 99,547.80, 149,552.10 and 68,443.80

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Solution

The fourth proportional to 99,547.80, 149,552.10 and 68,443.80 is: 102,824.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,547.80 : 149,552.10 = 68,443.80 : x
  2. Step 2: Convert to fraction form
    99,547.80/149,552.10 = 68,443.80/x
  3. Step 3: Cross multiply
    99,547.80x = 149,552.10 × 68,443.80
  4. Step 4: Simplify right side
    99,547.80x = 10,235,914,021.98
  5. Step 5: Solve for x
    x = 10,235,914,021.98/99,547.80
  6. Step 6: Final answer
    x = 102,824.11

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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.