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Finding the Fourth Proportional to 161,584.90, 242,415.81 and 81,425.91

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Solution

The fourth proportional to 161,584.90, 242,415.81 and 81,425.91 is: 122,158.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,584.90 : 242,415.81 = 81,425.91 : x
  2. Step 2: Convert to fraction form
    161,584.90/242,415.81 = 81,425.91/x
  3. Step 3: Cross multiply
    161,584.90x = 242,415.81 × 81,425.91
  4. Step 4: Simplify right side
    161,584.90x = 19,738,927,927.64
  5. Step 5: Solve for x
    x = 19,738,927,927.64/161,584.90
  6. Step 6: Final answer
    x = 122,158.25

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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.