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Finding the Fourth Proportional to 145,671.65, 218,507.97 and 40,490.51

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Solution

The fourth proportional to 145,671.65, 218,507.97 and 40,490.51 is: 60,735.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,671.65 : 218,507.97 = 40,490.51 : x
  2. Step 2: Convert to fraction form
    145,671.65/218,507.97 = 40,490.51/x
  3. Step 3: Cross multiply
    145,671.65x = 218,507.97 × 40,490.51
  4. Step 4: Simplify right side
    145,671.65x = 8,847,498,051.82
  5. Step 5: Solve for x
    x = 8,847,498,051.82/145,671.65
  6. Step 6: Final answer
    x = 60,735.90

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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.