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Finding the Fourth Proportional to 99,605.67, 149,455.13 and 49,689.62

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Solution

The fourth proportional to 99,605.67, 149,455.13 and 49,689.62 is: 74,557.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,605.67 : 149,455.13 = 49,689.62 : x
  2. Step 2: Convert to fraction form
    99,605.67/149,455.13 = 49,689.62/x
  3. Step 3: Cross multiply
    99,605.67x = 149,455.13 × 49,689.62
  4. Step 4: Simplify right side
    99,605.67x = 7,426,368,181.48
  5. Step 5: Solve for x
    x = 7,426,368,181.48/99,605.67
  6. Step 6: Final answer
    x = 74,557.69

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1.5x scale

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.