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Finding the Fourth Proportional to 90,788, 125,287.44 and 51,044

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Solution

The fourth proportional to 90,788, 125,287.44 and 51,044 is: 70,440.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,788 : 125,287.44 = 51,044 : x
  2. Step 2: Convert to fraction form
    90,788/125,287.44 = 51,044/x
  3. Step 3: Cross multiply
    90,788x = 125,287.44 × 51,044
  4. Step 4: Simplify right side
    90,788x = 6,395,172,087.36
  5. Step 5: Solve for x
    x = 6,395,172,087.36/90,788
  6. Step 6: Final answer
    x = 70,440.72

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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.