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Finding the Fourth Proportional to 89,373.88, 123,338.54 and 51,139.64

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Solution

The fourth proportional to 89,373.88, 123,338.54 and 51,139.64 is: 70,574.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,373.88 : 123,338.54 = 51,139.64 : x
  2. Step 2: Convert to fraction form
    89,373.88/123,338.54 = 51,139.64/x
  3. Step 3: Cross multiply
    89,373.88x = 123,338.54 × 51,139.64
  4. Step 4: Simplify right side
    89,373.88x = 6,307,488,533.73
  5. Step 5: Solve for x
    x = 6,307,488,533.73/89,373.88
  6. Step 6: Final answer
    x = 70,574.18

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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.