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Finding the Fourth Proportional to 76,915.28, 106,101.96 and 53,053.76

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Solution

The fourth proportional to 76,915.28, 106,101.96 and 53,053.76 is: 73,185.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,915.28 : 106,101.96 = 53,053.76 : x
  2. Step 2: Convert to fraction form
    76,915.28/106,101.96 = 53,053.76/x
  3. Step 3: Cross multiply
    76,915.28x = 106,101.96 × 53,053.76
  4. Step 4: Simplify right side
    76,915.28x = 5,629,107,921.37
  5. Step 5: Solve for x
    x = 5,629,107,921.37/76,915.28
  6. Step 6: Final answer
    x = 73,185.82

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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.