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Finding the Fourth Proportional to 84,642.37, 127,055.59 and 63,642.61

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Solution

The fourth proportional to 84,642.37, 127,055.59 and 63,642.61 is: 95,533.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,642.37 : 127,055.59 = 63,642.61 : x
  2. Step 2: Convert to fraction form
    84,642.37/127,055.59 = 63,642.61/x
  3. Step 3: Cross multiply
    84,642.37x = 127,055.59 × 63,642.61
  4. Step 4: Simplify right side
    84,642.37x = 8,086,149,362.40
  5. Step 5: Solve for x
    x = 8,086,149,362.40/84,642.37
  6. Step 6: Final answer
    x = 95,533.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.