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Finding the Fourth Proportional to 124,891.56, 172,187.64 and 90,905.58

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Solution

The fourth proportional to 124,891.56, 172,187.64 and 90,905.58 is: 125,331.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,891.56 : 172,187.64 = 90,905.58 : x
  2. Step 2: Convert to fraction form
    124,891.56/172,187.64 = 90,905.58/x
  3. Step 3: Cross multiply
    124,891.56x = 172,187.64 × 90,905.58
  4. Step 4: Simplify right side
    124,891.56x = 15,652,817,283.03
  5. Step 5: Solve for x
    x = 15,652,817,283.03/124,891.56
  6. Step 6: Final answer
    x = 125,331.27

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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.