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Finding the Fourth Proportional to 76,897.64, 106,171.20 and 49,739.54

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Solution

The fourth proportional to 76,897.64, 106,171.20 and 49,739.54 is: 68,674.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,897.64 : 106,171.20 = 49,739.54 : x
  2. Step 2: Convert to fraction form
    76,897.64/106,171.20 = 49,739.54/x
  3. Step 3: Cross multiply
    76,897.64x = 106,171.20 × 49,739.54
  4. Step 4: Simplify right side
    76,897.64x = 5,280,906,649.25
  5. Step 5: Solve for x
    x = 5,280,906,649.25/76,897.64
  6. Step 6: Final answer
    x = 68,674.50

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1.5x scale

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.