Home / 99,805.15-149,707.91-66,590.11

Finding the Fourth Proportional to 99,805.15, 149,707.91 and 66,590.11

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Solution

The fourth proportional to 99,805.15, 149,707.91 and 66,590.11 is: 99,885.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,805.15 : 149,707.91 = 66,590.11 : x
  2. Step 2: Convert to fraction form
    99,805.15/149,707.91 = 66,590.11/x
  3. Step 3: Cross multiply
    99,805.15x = 149,707.91 × 66,590.11
  4. Step 4: Simplify right side
    99,805.15x = 9,969,065,861.82
  5. Step 5: Solve for x
    x = 9,969,065,861.82/99,805.15
  6. Step 6: Final answer
    x = 99,885.29

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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.