Home / 145,137.13-217,708-55,181.21

Finding the Fourth Proportional to 145,137.13, 217,708 and 55,181.21

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Solution

The fourth proportional to 145,137.13, 217,708 and 55,181.21 is: 82,772.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,137.13 : 217,708 = 55,181.21 : x
  2. Step 2: Convert to fraction form
    145,137.13/217,708 = 55,181.21/x
  3. Step 3: Cross multiply
    145,137.13x = 217,708 × 55,181.21
  4. Step 4: Simplify right side
    145,137.13x = 12,013,390,866.68
  5. Step 5: Solve for x
    x = 12,013,390,866.68/145,137.13
  6. Step 6: Final answer
    x = 82,772.69

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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.