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Finding the Fourth Proportional to 127,485.66, 175,967.29 and 85,044.09

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Solution

The fourth proportional to 127,485.66, 175,967.29 and 85,044.09 is: 117,385.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,485.66 : 175,967.29 = 85,044.09 : x
  2. Step 2: Convert to fraction form
    127,485.66/175,967.29 = 85,044.09/x
  3. Step 3: Cross multiply
    127,485.66x = 175,967.29 × 85,044.09
  4. Step 4: Simplify right side
    127,485.66x = 14,964,978,814.00
  5. Step 5: Solve for x
    x = 14,964,978,814.00/127,485.66
  6. Step 6: Final answer
    x = 117,385.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.