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Finding the Fourth Proportional to 99,739.65, 149,480.21 and 40,506.51

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Solution

The fourth proportional to 99,739.65, 149,480.21 and 40,506.51 is: 60,707.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,739.65 : 149,480.21 = 40,506.51 : x
  2. Step 2: Convert to fraction form
    99,739.65/149,480.21 = 40,506.51/x
  3. Step 3: Cross multiply
    99,739.65x = 149,480.21 × 40,506.51
  4. Step 4: Simplify right side
    99,739.65x = 6,054,920,671.23
  5. Step 5: Solve for x
    x = 6,054,920,671.23/99,739.65
  6. Step 6: Final answer
    x = 60,707.26

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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.