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Finding the Fourth Proportional to 161,757.40, 242,643.30 and 55,139.80

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Solution

The fourth proportional to 161,757.40, 242,643.30 and 55,139.80 is: 82,712.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,757.40 : 242,643.30 = 55,139.80 : x
  2. Step 2: Convert to fraction form
    161,757.40/242,643.30 = 55,139.80/x
  3. Step 3: Cross multiply
    161,757.40x = 242,643.30 × 55,139.80
  4. Step 4: Simplify right side
    161,757.40x = 13,379,303,033.34
  5. Step 5: Solve for x
    x = 13,379,303,033.34/161,757.40
  6. Step 6: Final answer
    x = 82,712.15

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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.