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Finding the Fourth Proportional to 84,978, 127,962.81 and 62,947.62

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Solution

The fourth proportional to 84,978, 127,962.81 and 62,947.62 is: 94,788.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,978 : 127,962.81 = 62,947.62 : x
  2. Step 2: Convert to fraction form
    84,978/127,962.81 = 62,947.62/x
  3. Step 3: Cross multiply
    84,978x = 127,962.81 × 62,947.62
  4. Step 4: Simplify right side
    84,978x = 8,054,954,338.01
  5. Step 5: Solve for x
    x = 8,054,954,338.01/84,978
  6. Step 6: Final answer
    x = 94,788.70

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.